Database Info

Meizu E3 unlock bootloader tutorial

Dear all,
Here is a tutorial to unlock meizu E3 without any malicious software.
The idea is to edit frp partition and make the fastboot flashing unlock pass the security check.
Please note below might damage your phone so do it as your own risk, i do not responsible to any damage made.
Detail step:
(1)get root access
(2)install terminal emulater app
(3)dump frp partition
(4)modify frp by hex editor at offset 7fff8 and 7fff to 1 (not sure 7fff8 or 7ffff take the effect, so i edit both) as frp1
(5)write frp1 back to frp partition
(6)reboot boot loader
(7)fastboot flashing unlock
(8)press up-vol or down-vol (not sure, i stop here, feedback welcome)
(9)done
This is generic enough for MTK and Qcom soc, success story other than sdm636 and mt6755 are welcome.
Other phone unlock tutorial:
Meizu M3note bootloader unlock
Regards,
99degree

An unofficial twrp for MeizuE3 is available below for people unlocked bootloader and would like to play with custom rom.
twrp custome ver 3.3.1:
http://s000.tinyupload.com/?file_id=01088261345935635855
-ramdisk is from twrp.me model whyred
-kernel is self compile, based on LA.UM.8.2.r1-05700-sdm660.0
-with lcd and touchpad driver patched
BTW, this twrp support encrypted data partition, so it is working parallel with flyme8 well.
An official MeizuE3 recovery img is also provided here for people would like to boot and restore flyme back.
https://gofile.io/?c=pFRTJy
A vlog for booting MeizuE3 with LineageOS 17.1 up to splash screen is available at youtube:
It is based on below LOS custom system build from rcstar6696 and kvsjxd, credit him:
https://forum.xda-developers.com/mi-a2/development/10-x-lineage-17-0-jasminesprout-t3966643
and with his another wayne vendor:
https://forum.xda-developers.com/mi-a2/xiaomi-6x-wayne/rom-lineageos-17-0-t3989193

Found in other thread* that mentioned about persist partition might be wiped by LOS17 or other custom rom and cause Wlan mac missing etc. I suspect this is also true for unstable wifi too. So if there is anybody have an original persist partition dump please upload and share. [20200303]The issue is fixed by two thing. /persist/wlan_mac.bin modification. Recompile kernel to include 3 more modules (fw-api, qca-wifi-host-cmn, qcacld-3.0).
https://forum.xda-developers.com/showpost.php?p=80217431&postcount=2

Hi there,
MeizuE3 boots up LOS17.1 with WIFI, detail is at below youtube video. Check it out!
Custom ROM from rcstar6696 and ItsMeShouko, creadit them.
https://forum.xda-developers.com/mi-a2/development/10-x-lineage-17-0-jasminesprout-t3966643
Or my modified ROM based on above jasmine sprout ROM.
https://forum.xda-developers.com/android/development/meizu-e3-lineageos-17-1-rom-porting-t4055605
Thx,
99degree

64 Bit OS Development

Edit 25/10/2020: OK its been a while guys, if you want to try a ROM I'd highly recommend following LineageOS's wiki for instructions. Then if u want to try other ROMs keep an eye out in these forums, ill have a build up every now and then. See ya around guys
==========================================================================================
Rather than having random comments in random parts of the forum here is a thread for everything 64 bit on G7 Play.
CURRENT STATUS
WE DID IT!!!! CHECK SyberHexen's ANDROIDFILEHOST FOR DOWNLOAD!
OLD POST ARCHIVED BELOW
And here is what is available so far:
A nice selection of ROMs for the other G7's, but they dont actually boot on the Play, although should do something in theory
postmarketOS is aarch64, but that is mobile linux, and no phone interface works (x.org doesnt work with the current drivers)
Here is what I've tried:
crDroid from ocean:
I got it to install by: repartitioning device using ocean gpt.bin
Then flashing stock rom from channel
Booting TWRP
Flashing ROM, with modified zip accepting channel
Doesnt boot
Also tried a flash using ocean firmware completely, doesn't boot, but got the logos and bootloader works lol
If anyone has any tips or progress drop it here, eta kids go away. Read the status above if you want the up-to-date answer

00p513 said:
Rather than having random comments in random parts of the forum here is a thread for everything 64 bit on G7 Play.
CURRENT STATUS
NO 64-BIT ANDROID ROM AVAILABLE
And here is what is available so far:
A nice selection of ROMs for the other G7's, but they dont actually boot on the Play, although should do something in theory
postmarketOS is aarch64, but that is mobile linux, and no phone interface works (x.org doesnt work with the current drivers)
Here is what I've tried:
crDroid from ocean:
I got it to install by: repartitioning device using ocean gpt.bin
Then flashing stock rom from channel
Booting TWRP
Flashing ROM, with modified zip accepting channel
Doesnt boot
Also tried a flash using ocean firmware completely, doesn't boot, but got the logos and bootloader works lol
If anyone has any tips or progress drop it here, eta kids go away. Read the status above if you want the up-to-date answer
Click to expand...
Click to collapse
You have to compile the kernel from source and use a 64bit gsi and flash a 64 bit vendor partition I'm pretty sure everythi
---------- Post added at 04:44 AM ---------- Previous post was at 04:42 AM ----------
00p513 said:
Rather than having random comments in random parts of the forum here is a thread for everything 64 bit on G7 Play.
CURRENT STATUS
NO 64-BIT ANDROID ROM AVAILABLE
And here is what is available so far:
A nice selection of ROMs for the other G7's, but they dont actually boot on the Play, although should do something in theory
postmarketOS is aarch64, but that is mobile linux, and no phone interface works (x.org doesnt work with the current drivers)
Here is what I've tried:
crDroid from ocean:
I got it to install by: repartitioning device using ocean gpt.bin
Then flashing stock rom from channel
Booting TWRP
Flashing ROM, with modified zip accepting channel
Doesnt boot
Also tried a flash using ocean firmware completely, doesn't boot, but got the logos and bootloader works lol
If anyone has any tips or progress drop it here, eta kids go away. Read the status above if you want the up-to-date answer
Click to expand...
Click to collapse
You have to compile the kernel from source and use a 64bit gsi and flash a 64 bit vendor partition I'm pretty sure everything else will work fine. I'm working on getting a new dev environment set up I'll give it a shot... This phone is reeeeealy under developed. Proly cause the g6 play is a way better phone and much cheaper to boot

mrsurge said:
You have to compile the kernel from source and use a 64bit gsi and flash a 64 bit vendor partition I'm pretty sure everythi
---------- Post added at 04:44 AM ---------- Previous post was at 04:42 AM ----------
You have to compile the kernel from source and use a 64bit gsi and flash a 64 bit vendor partition I'm pretty sure everything else will work fine. I'm working on getting a new dev environment set up I'll give it a shot... This phone is reeeeealy under developed. Proly cause the g6 play is a way better phone and much cheaper to boot
Click to expand...
Click to collapse
We have a 64-bit kernel and 64-bit Lineage OS testing builds but porting 64-bit vendor partition for it to flash in g7 play hasn't been achieved yet.

kD said:
We have a 64-bit kernel and 64-bit Lineage OS testing builds but porting 64-bit vendor partition for it to flash in g7 play hasn't been achieved yet.
Click to expand...
Click to collapse
I think maybe you can just pick out driver binaries from 64 bit /vendor and use all the configs scripts and frameworks from the original vendor
Try backing up/vendor pieceing the drivers from another device of the same model but diff carrier and a combo as such would work. If not mistaken the. Vendor from the Verizon g6 play worked for sprint except data and wifi or radio in general didn't work.. that's a start right there
I think the modem is going to be the same architecture no matter what so you wouldn't have to worry to much about that

64bit Test
Okay so this sh*t probably totally won't boot up at all, but if someone is feeling brave, you can test this out.
1. From your active slot, with root access, you'll need to dd these images to the correct partitions. It's easiest to do this from the internal sdcard using termux. Use the following as a template. These commands assume you're installing it to slot b.
Code:
su
dd if=/sdcard/boot64.img of=/dev/block/by-name/boot_b
dd if=/sdcard/dtbo64.img of=/dev/block/by-name/dtbo_b
dd if=/sdcard/vendor64.img of=/dev/block/by-name/vendor_b
dd if=/sdcard/oem64.img of=/dev/block/by-name/oem_b
2. Reboot into fastboot, swap active slots, and wipe userdata + DDR. Then flash an arm64 AB GSI. I'd recommend trying Phh's AOSP Vanilla to maximize the chances of success.
To swap slots and wipe user data...
Code:
fastboot --set-active=_b
fastboot erase userdata
fastboot erase DDR
3. Reboot system, and tell me what happens.
**Do NOT attempt to use TWRP with this. You'll probably have to reflash stock firmware to the slot you tampered with to get everything back to normal afterwards.**
Link: 64bit Folder
This is not source built, and it's very much a hack job, so I'm really not expecting anything to work. I did get Ubuntu installed this morning, so I will attempt to build from source in the near future.

Please don't use this if you don't know what a "brick" is or how to recover from one

PS: it probably wont work cause vendor is twice the size xD

The G7 play is coming so far little by little it was like yesterday we never thought we would have twrp and magisk and now in fact we do on a GSI
([emoji88]Havoc GSI[emoji88])

00p513 said:
PS: it probably wont work cause vendor is twice the size xD
Click to expand...
Click to collapse
You are correct. She's way too hefty. It's ~164mb too large. I tried resizing last night, but I can only shrink it to 433mb. I can probably remove the modem files and replace them with the ones from stock. I think it's where most of the extra weight is from. The 64bit libs are about 1.5x bigger, but I don't think that accounts for all of it. The Muppets have a tree for sdm632, so all I need to do is look at it, and delete everything in vendor that's not in there. It should help but I'm not sure if it'll be enough. I could repartition it, but I'm not a fan of resizing partitions because I'm very fearful of bricks.

Spaceminer said:
You are correct. She's way too hefty. It's ~164mb too large. I tried resizing last night, but I can only shrink it to 433mb. I can probably remove the modem files and replace them with the ones from stock. I think it's where most of the extra weight is from. The 64bit libs are about 1.5x bigger, but I don't think that accounts for all of it. The Muppets have a tree for sdm632, so all I need to do is look at it, and delete everything in vendor that's not in there. It should help but I'm not sure if it'll be enough. I could repartition it, but I'm not a fan of resizing partitions because I'm very fearful of bricks.
Click to expand...
Click to collapse
I can get a bit more space with an ocean gpt.bin btw. i suppose we could see how those files work i guess and make a bigger vendor?

00p513 said:
I can get a bit more space with an ocean gpt.bin btw. i suppose we could see how those files work i guess and make a bigger vendor?
Click to expand...
Click to collapse
Have you flashed the gpt.bin from ocean before? If so I'll definitely try using that with the slightly smaller vendor I made. I'm thinking most things from Ocean should work natively. The only difference is screen size by a few pixels, ram, and battery capacity. Otherwise they're essentially the same.

Spaceminer said:
Have you flashed the gpt.bin from ocean before? If so I'll definitely try using that with the slightly smaller vendor I made. I'm thinking most things from Ocean should work natively. The only difference is screen size by a few pixels, ram, and battery capacity. Otherwise they're essentially the same.
Click to expand...
Click to collapse
yeah i use channel firmware extracted, then i use motoflash2sh to generate a bashscript from the flashfile. I then replace gpt .bin and remove it from the md5 checks at the beginning of the script. run the script and im repartitioned!

00p513 said:
yeah i use channel firmware extracted, then i use motoflash2sh to generate a bashscript from the flashfile. I then replace gpt .bin and remove it from the md5 checks at the beginning of the script. run the script and im repartitioned!
Click to expand...
Click to collapse
That's awesome! I'll try working with this.

Spaceminer said:
That's awesome! I'll try working with this.
Click to expand...
Click to collapse
ill send a repartition kit later. just unzip and run the script

00p513 said:
ill send a repartition kit later. just unzip and run the script
Click to expand...
Click to collapse
I already found it. So I'd just remove 61863ba7dac0c512d610ffa6406a50f8 and it'll flash correct?
Code:
md5sum --check <<EOF || exit 1
[B]61863ba7dac0c512d610ffa6406a50f8[/B] *gpt.bin

Spaceminer said:
I already found it. So I'd just remove 61863ba7dac0c512d610ffa6406a50f8 and it'll flash correct?
Code:
md5sum --check <<EOF || exit 1
[B]61863ba7dac0c512d610ffa6406a50f8[/B] *gpt.bin
Click to expand...
Click to collapse
that whole line needs deleting. That is just to stop it failing on md5 verification ,as it is a dfiferent file

Spaceminer said:
I already found it. So I'd just remove 61863ba7dac0c512d610ffa6406a50f8 and it'll flash correct?
Code:
md5sum --check <<EOF || exit 1
[B]61863ba7dac0c512d610ffa6406a50f8[/B] *gpt.bin
Click to expand...
Click to collapse
Did it work? Any update on the vendor image?

00p513 said:
Did it work? Any update on the vendor image?
Click to expand...
Click to collapse
I haven't tried it yet. I got side tracked compiling twrp. I'm 3 errors away from success. Something about unknown compiler flags.

As an FYI, I'm out of a computer for the next several months, possibly up to a year. I'm going through a nasty divorce at the moment, and that's all I'm going to say about that. I'll get back into the game as soon as I can, but for now, you should not expect me to put out anything new for quite awhile. I can and will help people as much as possible during this time. But my ability to do so is going to be hindered without an PC.

I'm sorry to hear that. My divorce lasts since two years.
However, that's not why I registered. I received a Moto G7 Play for app security testing just a few days ago and found this forum when trying to install GSI to the phone. Everything works fine, but I'm interested to upgrade the OS to 64bit. Therefore, I'd like to try out the work already present in this thread. Unfortunately, I have neither found the repartition kit nor gained enough information about gpt.bin file format yet in order to repartition the flash memory of the G7 Play.
I'd really appreciate if anybody could either post or send me the repartition kit or supply information about the partition table format, because I failed to google for that kind of information.
[edit] Ok, I found out how to change partition size to the size of ocean. I flashed the following images:
* Partition table from ocean
* Everything else except system_a from channel
* system_a from phh (binder64)
Everything worked just fine.
Then I proceeded to flash the files posted in this thread earlier. The vendor64.img fits into the new partition layout just fine. After flashing all 4 files, I proceeded to flash phh 64bit version. Then I rebooted, but the boot failed:
First, the device showed up some very long hexadecimal number (maybe some UUID?) on a black screen, where it had shown "bad key" before when everything went right.
Afterwards, it ran into fastboot:
Start Up Failed:
Your device didn't start up successfully.
Use Software Repair Assistant on computer to repair your device.
Connect your device to your computer to get the Software Repair Assistant.
AP Fastboot Flash Mode (Secure)
Failed to verify hab image boot_a
Error: failed to load kernel!
No bootable A/B slot
Failed to boot Linux,falling back to fastboot
Fastboot Reason: Fall-through from normal boot mode
Click to expand...
Click to collapse
So, I'm back on binder64 again.
Please, could you provide any help for fixing the images, or at least the information how you have built the 64bit images?

[ROM][UNOFFICIAL] LineageOS 17.1 for Unihertz Atom L (20200828)

Introduction
This thread contains the LineageOS 17.1 custom firmware images for the Unihertz Atom L, a rugged Android phone released by Unihertz in July 2020, and the accompanying LineageOS Recovery used for flashing the firmware.
Please note that this ROM is one of my side projects, for which I could provide zero warranty. By installing this ROM, you acknowledge that you take all the risks that come with installing custom firmwares on your devices, including but not limited to bricking your device, losing your data, etc. You are always suggested to keep backups and make sure you know how to flash back to official ROM before trying any custom ROMs.
Please find the download links in the Download section. The following sections are guides to installing the ROM.
WARNING: DO NOT try to install this on Atom XL. This is ONLY for the Atom L.
Working Features
- All basic features (Telephony, VoLTE, Audio, Camera, NFC, WiFi, Bluetooth, ....)
- Programmable PTT (red) button (Functionality can be set in Settings - System - Buttons, under the "Search Button" section)
- 48MP camera seems to be working (unlike on many other super resolution devices)
Known Issues
- VoLTE is working (at least for me) but sometimes quirky. If you find it somehow stopped working, usually turning it off and back on again (in Settings - Network - Mobile Network) will fix it. Putting the device to SELinux Permissive mode also fixes most of the VoLTE quirks but this is not recommended (a few quirks in Enforcing mode is better than having the whole device Permissive)
Unlocking
1. Boot your Atom L to the official OS
2. Go into Settings - About phone, tap "build number" several times to enable developer settings
3. Go to Settings - System - Developer Settings, enable OEM unlocking and ADB debugging
4. Run `adb reboot bootloader` on your PC (there is no way to enter bootloader directly, only possible through adb)
5. Run `adb flashing unlock` and comfirm unlock on device (THIS WILL WIPE ALL DATA)
6. Reboot and now you should see an unlocked warning during boot screen.
Installing LineageOS Recovery
For now the only working recovery is the LineageOS Recovery, because the device's kernel does not load the touch driver in recovery mode for whatever reason, rendering TWRP useless.
1. Download `lineage_recovery_XXX.img` and `vbmeta.zip`, unpack `vbmeta.zip` to get three .img files starting with `vbmeta`
2. Run `adb reboot bootloader` to put your device in bootloader mode
3. Run `fastboot flash --disable-verification --disable-verity vbmeta vbmeta.img`
4. Run `fastboot flash --disable-verification --disable-verity vbmeta_system vbmeta_system.img`
5. Run `fastboot flash --disable-verification --disable-verity vbmeta_vendor vbmeta_vendor.img`
6. Run `fastboot flash recovery lineage_recovery_XXX.img`
7. Run `fastboot reboot recovery` to reboot into the newly-installed LineageOS Recovery
The LineageOS Recovery is operated by volume keys as selection and power as confirmation (or entering sub-menus). To return to upper levels of menus from sub-menus, press volume up until the selection goes to the first item and then disappears, then press power (i.e. there's a hidden "Go Back" item at the very top of each sub-menu).
The recovery will show a verification failed prompt for most packages that are not signed with the AOSP keys. This is safe to ignore.
Installing LineageOS 17.1
The LineageOS image must be installed via LineageOS recovery.
1. Download `lineage-17.1-Atom_L-XXX.zip`
2. Reboot your device into recovery (`adb reboot recovery` or simply hold volume up while turning power on)
3. Wipe all data (factory reset) (THIS DELETES EVEN INTERNAL STORAGE)
4. Choose Apply Update, then Apply Update from ADB
5. Run `adb sideload lineage-17.1-Atom_L-XXX.zip` from your PC
6. Wait for the process to finish. (The recovery might prompt something about verification failure, just ignore it and continue anyway)
7. At this point, you can then sideload the LATEST Magisk and OpenGAPPS Nano at your will (note that the size of the system partition might only be enough for the `nano` variant of OpenGAPPS) (If installing Magisk / OpenGAPPS fails, you can try rebooting into recovery again in advanced menus, then try installing them again)
8. Reboot into system and enjoy (Note that Magisk might cause your device to boot loop once or two but it will eventually boot)
When updating to a newer build, you have to flash the new zip, and then re-flash whatever mod you have installed previously (Magisk / GAPPS).
Download Links
LineageOS:
lineage-17.1-Atom_L-20200828-peter-signed.zip: https://mega.nz/file/bAgh1BZA#jzMs_0e9NUR9NcALXWp51ZeWttM5rl_3K5T8Or9hAW0
- Synchronized updates from LineageOS upstream.
lineage-17.1-Atom_L-20200728-peter-signed.zip: https://mega.nz/file/vBwlmL5D#wpw8RovBHyVFCLFlhQ2H5QAIb0ECXkT4of0FRijiP6A
LineageOS Recovery:
lineage_recovery_20200728.img: https://mega.nz/file/yc4Dnbyb#yx0Ci9p3q9_lfAiXkGfgWDFnRJI-JSGrv3kyawkU3fw
vbmeta:
vbmeta.zip: https://mega.nz/file/nF51mBoY#ZNY4j92wc_6a1dXch3l5r-w4VFl9QjN7YJaRMKRoEGk
XDA:DevDB Information
LineageOS 17.1 for Unihertz Atom L, ROM for the Android General
Contributors
PeterCxy
Source Code: https://cgit.typeblog.net/android/device/unihertz/Atom_L/
ROM OS Version: Android 10
Version Information
Status: Alpha
Created 2020-07-28
Last Updated 2020-07-28

How different is the Atom XL?
PeterCxy said:
Introduction
WARNING: DO NOT try to install this on Atom XL. This is ONLY for the Atom L.
Unfortunately I've got the XL version which I thought only varied from the L by the presence of a UHF radio! Can you explain to me why its not a suitable candidate for your mods which sound very good!?
And before you ask, I only got this radio for hacking so I don't mind experimenting if that is required. Please let me know if I can help.
The Bitfarmer
Click to expand...
Click to collapse

tvroman said:
PeterCxy said:
Introduction
WARNING: DO NOT try to install this on Atom XL. This is ONLY for the Atom L.
Unfortunately I've got the XL version which I thought only varied from the L by the presence of a UHF radio! Can you explain to me why its not a suitable candidate for your mods which sound very good!?
And before you ask, I only got this radio for hacking so I don't mind experimenting if that is required. Please let me know if I can help.
The Bitfarmer
Click to expand...
Click to collapse
Because Unihertz publishes completely different firmware files for the L and XL, so the safest assumption is that there is more difference than just the UHF radio. If you want to risk it, then you CAN try using this ROM on the XL, as long as you know how to revert back to official if things go wrong. (But I cannot guarantee if the kernel image from L that this ROM uses will not cause serious issues like corrupted baseband or something on the XL)
My suggestion is that instead of trying this ROM directly on the XL, someone with XL can try to modify my device tree for L, replacing the kernel, dtbo images and other vendor blobs from the ones from XL, and then re-compile the ROM for XL. This would be the proper way to handle these two devices.
Click to expand...
Click to collapse

Going XL
Hi.
Great work. :good:
I want to built a ROM for the Atom XL myself. And because I'm no expert on this (for now) I'm in search of guides and hints on how to achieve my goal.
As far as I know the biggest problem with Unihertz is that they use a Mediatek chipset with which they are not allowed to provide the sourcecode of the kernel. Or at least you have to pay for it from Mediatek.
But there are some variants of the chipset (Helio P60; mt6771) used in other mobile phones (e.g. Nokia X5) for which I was able to find kernelsources on Github. Using these and the latest Android kernel from google I tried to compile a kernel as a starting point. I was able to extract the build.config directly from the phone which helped tremendously. This should at least get me to the point where I'm able to assemble a TWRP build. But I believe that I'm still missing some (vital?) drivers which are specific to the actual device. This includes I think the missing touchscreen driver that you mentioned is preventing the recovery to be useful.
So now I'm a little bit stuck, because most of the guides to arrange a LineageOS (or any other custom ROM) build tree I found require the sourcecode from the manufacturer which we don't have. All other guides to build from scratch were too generic for my current level of expertise.
Can you please share your approach to create this build?
If you don't want to do this in the open you could also PM me.
With kind regards
ADT

a-dead-trousers said:
Hi.
Great work. :good:
I want to built a ROM for the Atom XL myself. And because I'm no expert on this (for now) I'm in search of guides and hints on how to achieve my goal.
As far as I know the biggest problem with Unihertz is that they use a Mediatek chipset with which they are not allowed to provide the sourcecode of the kernel. Or at least you have to pay for it from Mediatek.
But there are some variants of the chipset (Helio P60; mt6771) used in other mobile phones (e.g. Nokia X5) for which I was able to find kernelsources on Github. Using these and the latest Android kernel from google I tried to compile a kernel as a starting point. I was able to extract the build.config directly from the phone which helped tremendously. This should at least get me to the point where I'm able to assemble a TWRP build. But I believe that I'm still missing some (vital?) drivers which are specific to the actual device. This includes I think the missing touchscreen driver that you mentioned is preventing the recovery to be useful.
So now I'm a little bit stuck, because most of the guides to arrange a LineageOS (or any other custom ROM) build tree I found require the sourcecode from the manufacturer which we don't have. All other guides to build from scratch were too generic for my current level of expertise.
Can you please share your approach to create this build?
If you don't want to do this in the open you could also PM me.
With kind regards
ADT
Click to expand...
Click to collapse
You don't need the kernel source code to build a working ROM -- just look at my device tree for Atom L. I think you can build a working ROM for the XL by just replacing the prebuilt kernel in my device tree with the one from Atom XL and also re-extracting the vendor blobs from XL using the script in my devcie tree, then rename everything to Atom XL instead of L. I don't know if the integrated amateur radio would still work though.

PeterCxy said:
You don't need the kernel source code to build a working ROM -- just look at my device tree for Atom L. I think you can build a working ROM for the XL by just replacing the prebuilt kernel in my device tree with the one from Atom XL and also re-extracting the vendor blobs from XL using the script in my devcie tree, then rename everything to Atom XL instead of L. I don't know if the integrated amateur radio would still work though.
Click to expand...
Click to collapse
I'm already on to that.
But I seem to have trouble extracting the prebuilt kernel. None of the tools I found gave me the exact files you have got (dtb.img, dtbo.img, Image.gz). What did you use?
The best I could get were "dtb", "kernel" and "dtborecovery" (without extensions) which roughly had the same size as yours.
Also, as far as I understand it, with your initial commit (without the modifications for Lineage itself) I should be able to at least compile a recovery image but I got an error regarding a missing dtb.img file in the "out" directory.
Something seems to be missing because, my dtb file is in the "device" directory and not being transfered into "out" during building.
I'm not sure that is because I have got a different naming scheme (renamig it didn't help) or I did something wrong with the extraction.
---------- Post added at 07:30 ---------- Previous post was at 07:14 ----------
Another question I have:
Are the vbmeta-files you used to flash the recovery the ones from the original firmeware zip from unihertz or did you get them from the lineage built?
And reguarding the rather smallish system partition:
I have an idea to bypass that by using the SPFlash Tool from Mediatek. As far as I understand the settings in the scatter-file this tool does a repartitioning of the internal storage. So we only need to "decrease" the userdata, "move" some partitions inbetween and "increase" the system. Only problem is, I couldn't find a partition designated as "system" in the scatter-file, only one big "super" and a "vbmeta-system" (which for my understaning is for verified boot) partition.
What do you think?

a-dead-trousers said:
I'm already on to that.
But I seem to have trouble extracting the prebuilt kernel. None of the tools I found gave me the exact files you have got (dtb.img, dtbo.img, Image.gz). What did you use?
The best I could get were "dtb", "kernel" and "dtborecovery" (without extensions) which roughly had the same size as yours.
Also, as far as I understand it, with your initial commit (without the modifications for Lineage itself) I should be able to at least compile a recovery image but I got an error regarding a missing dtb.img file in the "out" directory.
Something seems to be missing because, my dtb file is in the "device" directory and not being transfered into "out" during building.
I'm not sure that is because I have got a different naming scheme (renamig it didn't help) or I did something wrong with the extraction.
---------- Post added at 07:30 ---------- Previous post was at 07:14 ----------
Another question I have:
Are the vbmeta-files you used to flash the recovery the ones from the original firmeware zip from unihertz or did you get them from the lineage built?
And reguarding the rather smallish system partition:
I have an idea to bypass that by using the SPFlash Tool from Mediatek. As far as I understand the settings in the scatter-file this tool does a repartitioning of the internal storage. So we only need to "decrease" the userdata, "move" some partitions inbetween and "increase" the system. Only problem is, I couldn't find a partition designated as "system" in the scatter-file, only one big "super" and a "vbmeta-system" (which for my understaning is for verified boot) partition.
What do you think?
Click to expand...
Click to collapse
> None of the tools I found gave me the exact files you have got (dtb.img, dtbo.img, Image.gz). What did you use?
There is a tool called `unpack_bootimg` in the Android source code. Just run `make unpack_bootimg` in the root directory of the Android source tree and you will get one in the output directory. (btw I have renamed those extracted files so the names won't exactly match, but you need this tool to extract the correct images. All other tools won't work properly).
> my dtb file is in the "device" directory and not being transfered into "out" during building.
Because most tools other than `unpack_bootimg` extracts dtb incorrectly.
> Are the vbmeta-files you used to flash the recovery the ones from the original firmeware zip from unihertz or did you get them from the lineage built?
Those don't matter. Either will work as long as you flash it with the correct parameters as given in my post.
> And reguarding the rather smallish system partition
No don't do that. Android 10 does not use a separate system partition anymore, instead both system, vendor and product are sub-partitions in a huge super partition. When flashing a new ROM, the partitions are automatically resized to match the new image exactly, instead of leaving free space unused like before Android 10. That's why I need to reserve space in BoardConfig.mk for gapps to be installed correctly.

Still not able to build.
PeterCxy said:
There is a tool called `unpack_bootimg` in the Android source code. Just run `make unpack_bootimg` in the root directory of the Android source tree and you will get one in the output directory. (btw I have renamed those extracted files so the names won't exactly match, but you need this tool to extract the correct images. All other tools won't work properly).
Click to expand...
Click to collapse
I'm still getting an error:
Code:
FAILED: ninja: 'out/target/product/Atom_XL/dtb.img', needed by 'out/target/product/Atom_XL/boot.img', missing and no known rule to make it
Comparing your BoardConfig.mk with mine shows a slight difference in the offset and size values which could be associated with the different kernels of the phones.
But using "unpack_bootimg" I didn't get a value for "BOARD_KERNEL_OFFSET" like you have it in your config. Could this be the problem?
Your BoardConfig.mk
My BoardConfig.mk
Do you see anything else out of the ordinary?
(Because I'm doing everything what you did step-by-step the links point to the best matching commits)
Despite not being able to compile right now I tried to press on with integrating your changes in the hopes that it will be fixed somehow later on
So I'm currently stuck on this commit of yours:
Atom_L: import overlay from official vendor
Where did you get the "config.xml" and "power_profile.xml" from? The best thing I could find was a "power_profile.xml" inside "/vendor/overlay/FrameworkResOverlay/FrameworkResOverlay.apk" which seems to be a "compiled" version of the aforementioned xml-file.

a-dead-trousers said:
I'm still getting an error:
Code:
FAILED: ninja: 'out/target/product/Atom_XL/dtb.img', needed by 'out/target/product/Atom_XL/boot.img', missing and no known rule to make it
Comparing your BoardConfig.mk with mine shows a slight difference in the offset and size values which could be associated with the different kernels of the phones.
But using "unpack_bootimg" I didn't get a value for "BOARD_KERNEL_OFFSET" like you have it in your config. Could this be the problem?
Your BoardConfig.mk
My BoardConfig.mk
Do you see anything else out of the ordinary?
(Because I'm doing everything what you did step-by-step the links point to the best matching commits)
Despite not being able to compile right now I tried to press on with integrating your changes in the hopes that it will be fixed somehow later on
So I'm currently stuck on this commit of yours:
Atom_L: import overlay from official vendor
Where did you get the "config.xml" and "power_profile.xml" from? The best thing I could find was a "power_profile.xml" inside "/vendor/overlay/FrameworkResOverlay/FrameworkResOverlay.apk" which seems to be a "compiled" version of the aforementioned xml-file.
Click to expand...
Click to collapse
> Comparing your BoardConfig.mk with mine shows a slight difference in the offset and size values which could be associated with the different kernels of the phones.
TARGET_KERNEL_OFFSET should normally always be 0x00008000. Also, your other offset values seem to be wrong too -- those values from `unpack_bootimg` cannot be filled in directly to BoardConfig.mk. Instead, you need to subtract BOARD_KERNEL_BASE from them (e.g. BOARD_RAMDISK_OFFSET should be 0x55000000 - 0x40078000, which is 0x14f88000, the same as mine). In fact, I think those parameters should be exactly the same for XL and L. Other than that, I don't think I can see much of a problem about your makefiles.
However, note that not all of my historical commits represent a compilable state of the device tree. I'd suggest you start directly from the latest state and just replace whatever is relevant instead of starting over. And there should not be much that needs changing at all except device names, fingerprints and the proprietary vendor files.
> Where did you get the "config.xml" and "power_profile.xml" from
Exactly from those apks. Just decompile them using apktool.

PeterCxy said:
TARGET_KERNEL_OFFSET should normally always be 0x00008000. Also, your other offset values seem to be wrong too -- those values from `unpack_bootimg` cannot be filled in directly to BoardConfig.mk. Instead, you need to subtract BOARD_KERNEL_BASE from them (e.g. BOARD_RAMDISK_OFFSET should be 0x55000000 - 0x40078000, which is 0x14f88000, the same as mine). In fact, I think those parameters should be exactly the same for XL and L. Other than that, I don't think I can see much of a problem about your makefiles.
Click to expand...
Click to collapse
Still giving me errors.
So I tried a very unconventional approach: I just copied the file myself into the mentioned "out/target/product/Atom_XL" folder.
For now it's still compiling. Fingers crossed.
PeterCxy said:
However, note that not all of my historical commits represent a compilable state of the device tree. I'd suggest you start directly from the latest state and just replace whatever is relevant instead of starting over. And there should not be much that needs changing at all except device names, fingerprints and the proprietary vendor files.
Click to expand...
Click to collapse
I just reached your biggest commit yet.
Can you tell me how you got the list of needed files? I hope it's not through trial-and-error.
Except for the values in "setup-makefiles.sh" only the "proprietary-files.txt" seems to be device specific. Is there anything else I need to be aware of in this commit?
P.S.: I know it is tedious to go through your commits one by one but I want to learn something of it not just simply copying what you did. To get a feeling where the biggest pitfalls are and what you did to circumvent them.

a-dead-trousers said:
Still giving me errors.
So I tried a very unconventional approach: I just copied the file myself into the mentioned "out/target/product/Atom_XL" folder.
For now it's still compiling. Fingers crossed.
I just reached your biggest commit yet.
Can you tell me how you got the list of needed files? I hope it's not through trial-and-error.
Except for the values in "setup-makefiles.sh" only the "proprietary-files.txt" seems to be device specific. Is there anything else I need to be aware of in this commit?
P.S.: I know it is tedious to go through your commits one by one but I want to learn something of it not just simply copying what you did. To get a feeling where the biggest pitfalls are and what you did to circumvent them.
Click to expand...
Click to collapse
> Still giving me errors.
Looks like that dtb.img error was totally my fault -- it was due to my jerry-rigged solution of using prebuilt dtb image that conflicted with one of Lineage's update in August and I haven't built the ROM for a month. Now I have fixed it in the latest commit.
> Can you tell me how you got the list of needed files?
All of those files are for VoLTE support and I started with the list from a commit in Redmi Note 7 Pro's device tree that imported those VoLTE blobs, and then added what was missing one by one (when something is missing the Phone process will crash and you can see what got missing in the logs). I don't think the list will be any different on Atom XL so you can just use the one in my device tree.

Hi.
Thanks to you everything is running smoothly here. But what bugs me is that TWRP is not working on our devices.
Although for the Atom there is a possibility: https://forum.xda-developers.com/android/development/twrp-modded-to-unihertz-atom-t3885793
Before I want to go public with my build I wanted to solve this last "mystery".
So I tried to include it in my current source tree according to the (official?) guide but some errors prevented me from a successful build.
Naturally I asked for some guidance at the most reasonable places I know of but got nothing so far:
https://forum.xda-developers.com/showpost.php?p=83443611&postcount=4622
https://forum.xda-developers.com/showpost.php?p=83455271&postcount=4623
https://github.com/TeamWin/android_bootable_recovery/issues/70
I even tried different repositories (omnirom/android_bootable_recovery) and revisions (android-9.0) but these resulted in missing library "type" (static vs. shared) errors so I assume these are too old for LineageOS 17.1
What I want to know is how you managed to get TWRP to built for your device even though the touchscreen wasn't working?
Did you use your LineageOS source tree or one of the many "minimal" manifests? If so, which one would be the "best" to use?
wkr ADT

@PeterCxy and @a-dead-trousers
Thanks for all the work on this so far. I've got an Atom L and have gotten the ROM's PeterCxy posted running on them as in the OP. Do either of you have a quick step-by-step workflow of how you got all the Lineage sources set up and built into the various ROMs? I'd like to be able to build the ROMs from scratch and understand the process.
If I can get caught up to where you two are at with the builds, I can help debug, test and work through issues.

dirtylimerick said:
[MENTION=5351691] Do either of you have a quick step-by-step workflow of how you got all the Lineage sources set up and built into the various ROMs? I'd like to be able to build the ROMs from scratch and understand the process.
If I can get caught up to where you two are at with the builds, I can help debug, test and work through issues.
Click to expand...
Click to collapse
I documented my steps to setup up the build environment in the readme of my repo:
https://github.com/ADeadTrousers/android_device_Unihertz_Atom_XL
But leave out the TWRP part. It isn't working yet mostly because TeamWin/android_bootable_recovery and LineageOS/android_bootable_recovery are too similar.
To figure out all the bits and pieces needed for the device I followed the commit log of @PeterCxy build.

Hi, @PeterCxy.
Finally I was able to build a TWRP recovery and surprise, surprise the touchscreen isn't working.
But during my attempts to get a working TWRP build I came acros a guide that explains how to patch the kernel to get the touchscreen to work.
https://forum.hovatek.com/thread-27132.html
So I tried to follow it but failed to identify the "end" of the zipped Image-file (step 18) to remove the payload from the gz-file. Regardless of which of the null-bytes I use for cutting I always get a warning from 7-zip that there is still data at the end.
Do you know a better approach to achieve this whole patching? Maybe even come up with a scripting solution to easily apply this patch in later builds?
wkr ADT

a-dead-trousers said:
Hi, @PeterCxy.
Finally I was able to build a TWRP recovery and surprise, surprise the touchscreen isn't working.
But during my attempts to get a working TWRP build I came acros a guide that explains how to patch the kernel to get the touchscreen to work.
https://forum.hovatek.com/thread-27132.html
So I tried to follow it but failed to identify the "end" of the zipped Image-file (step 18) to remove the payload from the gz-file. Regardless of which of the null-bytes I use for cutting I always get a warning from 7-zip that there is still data at the end.
Do you know a better approach to achieve this whole patching? Maybe even come up with a scripting solution to easily apply this patch in later builds?
wkr ADT
Click to expand...
Click to collapse
There is no sane way to solve the problem without kernel source code. Basically the stock kernel just does not load the touch screen driver in recovery mode. That patching guide is pretty out of date and I imagine it won't work on most recent kernels. The only proper way is to pressure Unihertz to actually obey GPLv2 and release their kernel source code. Or maybe someone can try reverse-engineering the kernel, but at least I won't do it because it'll just be too much of a hassle.

PeterCxy said:
There is no sane way to solve the problem without kernel source code. Basically the stock kernel just does not load the touch screen driver in recovery mode. The only proper way is to pressure Unihertz to actually obey GPLv2 and release their kernel source code.
Click to expand...
Click to collapse
I'm with you on this one, but as long as we don't have the source code we need to resort to other means to achieve our goals.
PeterCxy said:
That patching guide is pretty out of date and I imagine it won't work on most recent kernels.
Click to expand...
Click to collapse
Yeah it's from way back in 2019
Anyway, with a little bit of tinkering I was able to modify my kernel to load the touchscreen driver in recovery mode.
Here is the device tree and the manifest i used.
I wouldn't recommend to use it in it's current state at all though because the fstab needs a little bit of tinkering. Everything seems to be either unordered or not mounted properly and I fear anything you do in there now will mess up the whole device. BUT I got the touchscreen goin for me which is nice.
PeterCxy said:
Or maybe someone can try reverse-engineering the kernel, but at least I won't do it because it'll just be too much of a hassle.
Click to expand...
Click to collapse
As soon as I have everything sorted out that needs to be fixed on my build (e.g. signing, radio, included gapps working properly, TWRP) I want to dig deeper into the kernel.
There are some devices with Helios P60 out there from other vendors which offer kernel sources.
P.S.: I also uploaded a HOW-TO in my device tree.
If you or someone else wants to try it. Also if you want to you can send me a "symbl.txt" (see to the HOW-TO) extracted from your device then I can do the patching for the Atom_L too.

a-dead-trousers said:
I'm with you on this one, but as long as we don't have the source code we need to resort to other means to achieve our goals.
Yeah it's from way back in 2019
Anyway, with a little bit of tinkering I was able to modify my kernel to load the touchscreen driver in recovery mode.
Here is the device tree and the manifest i used.
I wouldn't recommend to use it in it's current state at all though because the fstab needs a little bit of tinkering. Everything seems to be either unordered or not mounted properly and I fear anything you do in there now will mess up the whole device. BUT I got the touchscreen goin for me which is nice.
As soon as I have everything sorted out that needs to be fixed on my build (e.g. signing, radio, included gapps working properly, TWRP) I want to dig deeper into the kernel.
There are some devices with Helios P60 out there from other vendors which offer kernel sources.
P.S.: I also uploaded a HOW-TO in my device tree.
If you or someone else wants to try it. Also if you want to you can send me a "symbl.txt" (see to the HOW-TO) extracted from your device then I can do the patching for the Atom_L too.
Click to expand...
Click to collapse
Happy to hear that you were able to figure the touchscreen out. I tried to port TWRP at the very beginning when I started tinkering with the device but quickly grew frustrated and just ported Lineage Recovery instead. I guess I might try patching the kernel image too at some point later.
BTW, for TWRP to work with devices released after Android 10, I'm pretty sure you need an extra set of patches that are not yet fully merged to the main TWRP repository. I remember there's some guy providing another manifest with all the patches applied but I couldn't remember the name.

Hi.
I just officially announced my build for the Atom XL:
https://forum.xda-developers.com/android/development/rom-lineageos-17-1-unihertz-atom-xl-t4171407
Could you please put a link in your first post for those in search of the Atom XL and found your thread instead. Thanks.
wkr ADT

hi @PeterCxy.
During my daily usage of the phone I encountered a strage problem:
The audio jack isn't working. Plugging in some headphones I get this slight click in the earpieces when the circuits connect but nothing else happens. Neither a "headphone" icon in the status bar nor hearing anything coming from the headphones itself. The main speaker of the phone keeps playing the music. Using bluetooth everything is working as expected though. So I used logcat to see if something is coming up during plugging in but nothing "catchy" shows up in the logs. My guess is that some (vendor?) service is missing or not started during booting. Next I checked If something shows up on logcat during boot but I'm not sure for what to look exactly. There are quite a few errors and warnings though. In my despair I started to "fix" the "avc: denied" (SEPolicy) entries. Thats when I found a specific error reguarding VoLTE. Maybe this would fix the problems you had with VoLTE in enforcing mode:
https://github.com/ADeadTrousers/an..._Atom_XL/blob/master/sepolicy/private/init.te
(The line with "socket_device:sock_file")
My provider doesn't support VoLTE so I'm not sure if this helps or not. Maybe you could check it.
Anyway can you please tell me if your device's audio jack is working or not?
If you're (by some mysterious coincidence) not affected by this, can you at least give me some pointers for what to look for to get this fixed on my side.
The Internet Is not very helpful when searching for "android audio jack" or something similiar.
Thanks in advance.
wkr ADT

Lenovo Zuk Z2 plus Android 12 gsi bootloop

I flash android 12 beta Google gsi from the link below, I flashed it with twrp and I am facing bootloop in my z2 plus, any solution??
Generic System Image releases | Android Developers
Generic System Image releases | Platform | Android Developers
developer.android.com
I flashed the arm64

Exactly same problem here. If you find a solution please please please give a message on [email protected]
I am busy in fixing my sim card not working

If you flash a GSI image ( read: Vanilla ROM - AOSP ) then Android's OEM-created /vendor & /modem partitions gets lost. Probably /esf partition, too.
Hence you must not be surprised that phone is bootlooping

jwoegerbauer said:
If you flash a GSI image ( read: Vanilla ROM - AOSP ) then Android's OEM-created /vendor & /modem partitions gets lost. Probably /esf partition, too.
Hence you must not be surprised that phone is bootloop
Click to expand...
Click to collapse
jwoegerbauer said:
If you flash a GSI image ( read: Vanilla ROM - AOSP ) then Android's OEM-created /vendor & /modem partitions gets lost. Probably /esf partition, too.
Hence you must not be surprised that phone is bootlooping
Click to expand...
Click to collapse
This shouldn't be the case because earlier I have formatted my device using so flash tool. Each and every system partition got lost including efs(nvdata and nvram in my case). I actually found another reason: Kernel is 32 bit which doesn't support 64 bit gsi. I tried finding a 64 bit firmware for my device but there's none.

I have obtained the stock firmware for my device, how hard would it be to build generic android?

Hi, I just registered today to ask this question. Through somewhat simple means using the tools I had available, I was able to readback the stock rom from a TCL 20 XE 5087Z branded under Boost Mobile. I have successfully rooted via magisk and have confirmed that it is indeed the correct stock firmware through a bit of an accident, I forgot to patch vbmeta when flashing magisk_patched_boot.img, so in a panic, I flashed back all the roms I had read back from the device except userdata, and miraculously the device worked! Now the problem I run into is all the bloatware the carrier has installed on the phone. My main reason for rooting my device was I wanted the ability to prevent apps from being killed by the "Smart" manager on the device, because it seems that important apps keep getting killed by the built-in software. I ended up determining that the ram manager on the phone was killing apps based on the amount of ram available. Now that the phone is rooted, you would think I would have no problem getting rid of all the bloatware, except that whenever I forcefully uninstall the ram manager (com.tct.onetouchbooster), the app is still available on my apps menu and clicking on it with pretty much no delay opens the app right up as if the data had just been cleared. Now I have no idea what is causing this, probably another app, but I was wondering if maybe an easier alternative would be to get a generic android image for the device without bloatware that I can install just what I need. Now I say easier, but I find little documentation on how to do this, better yet if it will work. I have limited knowledge of how the android system works, mainly I just understand that /boot contains the bootloader, /system contains the os, and /userdata contains all the extra data apart from the stock image. If someone would enlighten me, would it actually be easier to build a generic image? Are there tools to do this? I understand that firmware is very touchy and that there is no "Generic" image in the sense, but having my stock rom available, would I be able to somehow generate a generic image based on the rom contents? If this would be way harder, how would I go about removing bloatware? I would not want to have to reset my phone each time I uninstall the wrong application, is there a non-data-damaging way to go about removing bloatware? If it ends up not being bloatware that is causing it and some hidden property somewhere in the stock rom config, how hard would it be to find that? Any help would be appreciated, and I am open to any comments and criticism. Please let me know how I might go about this, thanks in advance!
The stock firmware for this device can be found here: https://drive.google.com/file/d/1Q5IDP8V7PvuH2_1z63IFe23O2DF0cXZR/view?usp=sharing
The phone was bought from Walmart with prepaid Boost Mobile and it is a TCL 20 XE 5087Z with a MT6765 processor.
The password for the file is: xda5087Z-MT6765

Is the phone Project Treble enabled? If not don't waste your time.
A GSI is related to Project Treble, which means that the image can be installed on any Project Treble-supported device, regardless of the manufacturer, because it does not contain any hardware-specific components. The advantage is that a GSI can theoretically be used on any Project Treble-supported device.

xXx yYy said:
Is the phone Project Treble enabled? If not don't waste your time.
A GSI is related to Project Treble, which means that the image can be installed on any Project Treble-supported device, regardless of the manufacturer, because it does not contain any hardware-specific components. The advantage is that a GSI can theoretically be used on any Project Treble-supported device.
Click to expand...
Click to collapse
I downloaded the treble info app from the play store and indeed it is available with treble, the system image i need is system-arm64-ab.img.xz, would you mind pointing me in the right direction for how to install this? I'm assuming this just gets installed in the /system partition but let me know if I'm wrong. Thanks!

Can't help you, never did this.
You may look inside here:
[GUIDE] How to build a Project Treble GSI ROM from source? [31/08]
Hello guys, in this guide I'll try to simplify building Treble GSI process. As you read this guide now I'll assume you already have a previous knowledge about How to build android from source, so I won't cover some points with too many basic...
forum.xda-developers.com

Yes, only flash system.img. I recommend Android 10 (Android 11+ introduced restricted permissions)
[DISCONTINUED][GSI][10] LineageOS 17.x GSI (all archs)
Background: This is a natural continuation/extension of the LineageOS 16.0 GSIs I've been making since March 2019. If you clicked in here, I bet you know what LineageOS is already, but just to fill the blank: LineageOS is a free, community built...
forum.xda-developers.com

alecxs said:
Yes, only flash system.img. I recommend Android 10 (Android 11+ introduced restricted permissions)
[DISCONTINUED][GSI][10] LineageOS 17.x GSI (all archs)
Background: This is a natural continuation/extension of the LineageOS 16.0 GSIs I've been making since March 2019. If you clicked in here, I bet you know what LineageOS is already, but just to fill the blank: LineageOS is a free, community built...
forum.xda-developers.com
Click to expand...
Click to collapse
DO NOT DO THIS!!!! The TCL 20 XE is NOT compatible with Android 10 (it only supports something 30, which corresponds to Android 11), and the device will bootloop. I have made this mistake but I can not reach fastboot as the option is not in the recovery, therefore I need to run "adb reboot fastboot" within Android. MTKClient should fix this if you can find a stock super.img file for the 5087z.

note "adb reboot fastboot" is for fastbootd which is in recovery, while "adb reboot bootloader" is for fastboot (you can always enter from Volume button, regardless of destroyed boot/system partition)
boot-loop is probably caused by dm-verity, you forgot vbmeta?

alecxs said:
note "adb reboot fastboot" is for fastbootd which is in recovery, while "adb reboot bootloader" is for fastboot (you can always enter from Volume button, regardless of destroyed boot/system partition)
boot-loop is probably caused by dm-verity, you forgot vbmeta?
Click to expand...
Click to collapse
Fastbootd doesn't have an option in the recovery on my model, I've seen other TCL 20 XE phones have it though (I have the Boost Mobile varient like the thread maker), however Fastbootd let's me boot into recovery. I was only able to flash the stock ROM with MTKClient, which mikedcoombs thankfully provided (I just needed the super partition). For vbmeta, I just have an empty vbmeta that I flashed when I first rooted the phone. I don't think it is dm-verity, because LineageOS 20 as an GSI worked except for the Wi-Fi.