Installing TWRP to Samsung Galaxy A8 (2018) - General Questions and Answers

I have the phone mentioned in the subject. I followed this guide to install it. I don't have root yet, so obviously I followed the Odin Install method. The guide warns that after the first boot, the system will replace the new boot loader with the stock one, and this is exactly what happens. The guide says that I have to enter recovery mode and TWRP will fix this for me. However, I cannot enter recovery mode, because after finishing the download, the phone force-reboots, and I cannot even turn it off. The only thing I can do it is either let it boot and delete TWRP, or enter download mode again. How to solve this catch-22?
Actually, the first time I tried is to use Odin to install a patched system with Magisk, then install TWRP on the rooted phone. That works, but then I cannot update the system, because that requires Magisk to be installed from TWRP.

Related

[Q] How do I get my phone to stop going into Download Mode?

I have the Samsung Galaxy S4, jflteatt, SGH-I337, AT&T, rooted, and I tried to install TWRP from a IMG file using the TWRP Manager app because nothing else was working. I can go into detail if you want but that is the summarized version. I used a DD file from the twrp website and I downloaded it to my phone, then selected it and selected install in the TWRP Manager app. It said flash successful but when I rebooted to recovery using the app my phone went into download mode. It said "Could not do normal boot" ODIN Mode. On Knox Kernel it says "Lock" Does that mean that my boot loader is locked? I think when I tried to install TWRP incorrectly it did this because my boot loader is locked. Is this true? I know I when I tried to flash TWRP from a DD file that I did it incorrectly now. Didn't do my research and tried to flash a file in the TWRP manager app that was meant to be flashed in Terminal Emulator. Dumb move on my part.
Well anyway now that Flashify is working again I tried to install TWRP from there but it just goes into Download mode every time I try to reboot to recovery even though it said "Successful". I can't even get to my stock recovery since I messed up my phone. It just goes into download mode no matter what I try. I know that TWRP will be correctly installed on my phone if I use Flashify because it has worked for everybody else but I don't know if the fact that my bootloader could be potentially locked that it could be messing it up and not allowing the custom recovery to be installed. How to I make it stop going into download mode every time I try to go into recovery mode?
Could unlocking my bootloader any trying to flash TWRP again solve my problem?

[Completed] OnePlus One - Phone boots to fastmode and recovery

I have installed TWRP 3.0.2-0 to my OPO phone. I am trying to figure out why the OnePlus won't boot.
I am happy with the stock rom, but I want to root the phone.
The custom recovery was installed using a tool featured on Xda TV. This is the OnePlus Toolbox.
If I attempt to boot to system, the phone stays stuck on the bootloop process.
I am not sure if I have gained root access, since I was not able to push SuperSU.zip to my OPO.
I made a futile attempt to sideload the SuperSU.zip by installing it using TWRP, but then my phone wouldn't boot into any mode other than the fastboot mode.
So I reinstalled recovery, did a clean wipe and format data.
How do I get the phone to boot normally?
Hi
Follow this guide letter by letter
https://forum.xda-developers.com/oneplus-one/general/guide-return-opo-to-100-stock-t2826541

I cant install TWRP on SM-P900 ;(

Hi
This is really frustrating. I own many Samsung devices and never had any issue installing twrp, so I am not a noob when it comes to firing up Odin and flashing the image however I am stuck with this device.
I used couple guides with no success. ;( I cant get rid of the Samsung recovery and replace with TWRP. Odin says success but that is just a lie.
I tried both the lollilop bootloader and the older one then TWP with various versions (3.1x , 2.8.x) No luck.
Can anyone please provide me "working files" with "simple steps" in case I am missing out on some minor details. This is SM-P900 Kitkat 4.4.2 version.
- I flash the bootloader using the BL slot in dl mode
- I reboot to downloader again and and install TWRP
- I type adb revoot recovery
Boom, I am back to frigging Samsung recovery
Hi ,
This is a follow up
The only guide that worked for me is this one. It might be helpful to others.
https://forum.xda-developers.com/ga...guide-install-official-lollipop-p900-t3154362
I had trouble getting TWRP to take at first too. It seems Samsung overwrites the recovery upon rebooting so even though TWRP flashed successfully it just gets overwritten when the system restarts. The simple solution for me was to disable the Reboot option in Odin, install TWRP, manually shut down and then enter Recovery mode. Hope that helps. I came across this suggestion either in the thread linked to above or while googling.
Im installing into properly rooted and I have twrp 2.8.7. I want 3+ TWRP.
I flash with PDA/AP and with "autoreboot" unchecked. I power off and power+home+volUP for recovery.
Tablet enters a "enttering recovery" bootloop which can be only disrupted by going into power+home+volDWN to enter Download, and than I can flash with ODIN 2.8.7.
2.8.7 is the latest I can boot into. WHAT IS WRONG?!!!!!!!!! I lost hope, with flashing 100x
Did you try updating TWRP from inside TWRP?
Sent from my Samsung SM-P900 using XDA Labs
try do a full wipe from stock recovery . after that flash twrp selecting the ap and bl in ODIN twrp3.1....tar booth of them (AP & BL)
no no no i tried everything. but than I found out this post : https://s4.postimg.org/s3pel2ekd/this_guy.png and that solved the day!!
With p900 work perfect, but install hard. With this twrp 3.1 i install lineage 14.1, all works good.

Stuck on Boot screen after flashing TWRP

Hello,
I just flashed the latest ROM for the S8+ (AQL5) and that went well.
Afterwards I tried to flash TWRP, but now the phone is stuck on the Samsung screen.
I then followed the guide I found here to use the BL file of AQF7 in Odin and spam the Start button so I managed to get into TWRP.
Question is, what do I do next? I restart the system it's the same problem all over again.
No one explains anywhere what to do in TWRP to save the phone.
Can I remove TWRP or somehow save the phone (without wiping my data)
Please help
Can you get to download mode? Then go to ODIN and redo your flashing of the OS and then TWRP. After the flash of TWRP, immediately boot into TWRP, and do Verity if you want that, and your root, if not already done. Clear Dalvik/cache and reboot to system.
It is not uncommon for folks, following TWRP flash, to get stuck in boot loop, unfortunately. Can take a little time, but you will get through it and finally to System.
But I thought all new firmware versions are incompatible with TWRP and cause this error.
I might try to install TWRP again if I flash the latest compatible version (I think it's the F7 one).
Does "Verify" in TWRP make that annoying "Your phone is not verified" message go away? The only option is to Reset phone when that thing comes up and I don't want to do that.
I managed to get out of that by reflashing the AQL5 version and just not installing TWPR.
Kind of scared to retry because everything goes wrong when I try to follow the guides on here or youtube
nkomp18 said:
But I thought all new firmware versions are incompatible with TWRP and cause this error.
I might try to install TWRP again if I flash the latest compatible version (I think it's the F7 one).
Does "Verify" in TWRP make that annoying "Your phone is not verified" message go away? The only option is to Reset phone when that thing comes up and I don't want to do that.
I managed to get out of that by reflashing the AQL5 version and just not installing TWPR.
Kind of scared to retry because everything goes wrong when I try to follow the guides on here or youtube
Click to expand...
Click to collapse
Would you please provide the info from my first post? and Exynos of Snapdragon?
JeffDC said:
Would you please provide the info from my first post? and Exynos of Snapdragon?
Click to expand...
Click to collapse
I have Exynos - model SM-G955F
Yes I can go to download mode but I won't do the things you ask because they're guaranteed to soft-brick the phone again and I have it working now
i have the same problem, followed this guide https://forum.xda-developers.com/galaxy-s8/how-to/guide-how-to-root-galaxy-s8-crgh-rom-t3846009 managed to get to TWRP no problems, once i reset the device though im stuck at the samung galaxy s8+ boot screen and can't get it off
any suggestions ? i did try to search but this old thread was the only relevant one i could find
stuck on boot screen after flashing twrp for magisk manager
i flashed magisk manager in twrp youtube.com/watch?v=r3R9kiBIx34 by this and now not booting to android . before i had this i reflashed miui 11 using official software and coulnt be sucess this time also please help me any one . my mobile is redmi 6 pro.:crying::crying::crying::crying:

Stuck in CrashDump Mode

I just purchased a new OnePlus 7 Pro yesterday and immediately set about rooting it. This is the process I followed:
fastboot oem unlock
fastboot flash boot twrp-3.3.1-4-guacamole.img
TWRP: Install > Select Storage > Internal Storage > Magisk-v20.3.zip
TWRP: Wipe > Format Data
I rebooted and was confused when I wasn't rooted. It seemed the last step had undone my root, so I went back into TWRP and installed Magisk again this time without formatting data. When I rebooted I had root and all was well.
However, there was an OEM update available that warned me it would remove root if I installed it. I found this guide to install an OEM update without losing root, which basically says to download the update via Oxygen Updater and then install it from TWRP. On step 6 is says to select the "Inject TWRP after install" option, but this didn't exist in my TWRP. I went ahead without it, thinking maybe it was enabled by default in my newer version of TWRP. The installation seemed to go without a hitch, but when I rebooted after I was stuck in fastboot. I couldn't boot my phone, nor could I get back into TWRP or regular recovery, only fastboot.
I tried flashing TWRP again using fastboot, but to no avail. I also tried running fastboot -w, but was still stuck in fastboot. I did some more research and found this comment which made it seem like all I had to do was download 10.0-GM21AA-OnePlus7ProOxygen_21.O.20_OTA_020_all_1909172051_db7a3f61-FASTBOOT from here and then run flash-all.bat. Once I did so I ended up stuck on the following screen:
Code:
QUALCOMM CrashDump Mode
--------------------------
dm-verify device corrupted Force Dump
kernel_restart
I can't seem to do anything at all with my device; not even turn it off. I tried holding the power button down for nearly a minute and no response from the phone. Is there any hope at all for my phone or have I properly destroyed it?
https://forum.xda-developers.com/oneplus-7-pro/help/mistake-kernel-error-t4029743
Same thing happened to me and I searched around a bit and found resolution. You can try what I did or try msm tool but search first as crashdump error is becoming common issue it seems
I held both volume buttons until restart and let go of one of them to get into recovery and then boot to boot loader if needed
Thank you so much! I thought I'd corrupted fastboot and permanently bricked the phone.
Once I was in fastboot I used tool all in one to flash 9.5.13-GM21AA-OnePlus7ProOxygen_21.O.16_OTA_016_all_1908281716_b2bb5-FASTBOOT.zip onto my phone by picking Flash Factory Images, and now it's back up and running.
jasons1004 said:
I held both volume buttons until restart and let go of one of them to get into recovery and then boot to boot loader if needed
Click to expand...
Click to collapse
This was the magic trick I needed to know. Holding both volume buttons didn't quite work for me. I held them both down for over a minute and nothing happened. Then I tried holding down the power button and that seemed to work after several seconds. I didn't hold down volume down quickly enough the first time, so I had to do it again. I held both volume buttons and the power button for over a minute, but again, nothing. I tried a couple more times and got it to work. Haven't been able to figure out exactly what causes it to exit the CrashDump mode, but the volume buttons together seems to be the important part.
This time I tried doing the OEM updates first, thinking that attempting to install them manually is what caused my problem. First I installed the 10.0.3.GM21AA update, then after rebooting I installed the 10.3.0.GM21AA update. At this point it said my system was up to date, so I want ahead and booted into fastboot and ran fastboot flash boot twrp-3.3.1-4-guacamole.img. No errors, but no TWRP either. My phone was stuck in fastboot again.
Is it necessary to stick with 9.5.13 if I want root? Is there some way to get TWRP to work with 10?
altayh said:
This time I tried doing the OEM updates first, thinking that attempting to install them manually is what caused my problem. First I installed the 10.0.3.GM21AA update, then after rebooting I installed the 10.3.0.GM21AA update. At this point it said my system was up to date, so I want ahead and booted into fastboot and ran fastboot flash boot twrp-3.3.1-4-guacamole.img. No errors, but no TWRP either. My phone was stuck in fastboot again.
Is it necessary to stick with 9.5.13 if I want root? Is there some way to get TWRP to work with 10?
Click to expand...
Click to collapse
Just use tool to flash 9 then after first boot fasboot flash whatever 10 build you can find. Then after first boot of 10 try boot twrp and install twrp.
Honestly I just used the tool to root and flash recovery. There is a button for that and just pick your files. Good luck
altayh said:
This time I tried doing the OEM updates first, thinking that attempting to install them manually is what caused my problem. First I installed the 10.0.3.GM21AA update, then after rebooting I installed the 10.3.0.GM21AA update. At this point it said my system was up to date, so I want ahead and booted into fastboot and ran fastboot flash boot twrp-3.3.1-4-guacamole.img. No errors, but no TWRP either. My phone was stuck in fastboot again.
Is it necessary to stick with 9.5.13 if I want root? Is there some way to get TWRP to work with 10?
Click to expand...
Click to collapse
You need to use a more recent versions of TWRP with Android 10. Current unofficial version -74 should work. So in your current condition, you should be able to simply boot TWRP (using the correct version), flash TWRP installer zip (if you want TWRP installed), flash Magisk (current version is 20.3) and reboot and you should have root again.
Easiest way I've found to install the OTA updates, is to simply install the update through the phone settings, do NOT reboot immediately after the update, go into Magisk Manager, flash TWRP installer zip as if it were a Magisk module (optional, if you want TWRP installed), then install Magisk picking the option "Install to inactive slot (after OTA)". Than just reboot, and you should be updated and with root.
redpoint73 said:
You need to use a more recent versions of TWRP with Android 10. Current unofficial version -74 should work. So in your current condition, you should be able to simply boot TWRP (using the correct version), flash TWRP installer zip (if you want TWRP installed), flash Magisk (current version is 20.3) and reboot and you should have root again.
Click to expand...
Click to collapse
Ah, I was using the Official TWRP App to get the images so I was under the impression that twrp-3.3.1-4-guacamole.img was the latest. I assume you're saying I should use TWRP 3.3.1-74 Unified Unofficial Q by mauronofrio from over here instead.
redpoint73 said:
Easiest way I've found to install the OTA updates, is to simply install the update through the phone settings, do NOT reboot immediately after the update, go into Magisk Manager, flash TWRP installer zip as if it were a Magisk module (optional, if you want TWRP installed), then install Magisk picking the option "Install to inactive slot (after OTA)". Than just reboot, and you should be updated and with root.
Click to expand...
Click to collapse
This is good to know. Thanks.
Just to follow up, I applied the available OTAs through the phone settings (up to bulid 10.3.0.GM21AA) and then followed the More articulated but fully functional instructions to install TWRP 3.3.1-74 Unified Unofficial Q. Everything went well and I'm now up to date and rooted. Thanks again to both of you!
altayh said:
I assume you're saying I should use TWRP 3.3.1-74 Unified Unofficial Q by mauronofrio from over here instead.
Click to expand...
Click to collapse
That is the correct TWRP to use ("Unofficial" version -74), as it appears you have already determined.
I don't know why the "official" versions have fallen so far behind. It's been months stuck on version -4, so it seems that they have stopped going "official" for some reason. No matter, the unofficial versions are working fine (and in fact required for Android 10 as you now know), so the "official" tag seems like a technicality.
On these OnePlus phones I don't know why they love Qualcomm Crashdump mode. I fixed it sort of like you, but this worked 100%. You hold all 3 buttons (power, vol up, vol down) and you bypass the crashdump (takes several seconds 5 maybe 10), just quickly let go so you'll be in fastboot mode and can work your magic to fix the damn thing....
I even contacted OnePlus on an 8 they had no idea what to do...
Fastboot flash boot recovery.img <-- bad idea
Fastboot boot recovery.img <-- provit

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