Downgrade from oreo 8 to android 6 or 7 - MTCD Android Head Units Q&A

I have installed android 8 but my bluetooth does not work how do i downgrad to 6 or 7 i have tried to search but cant find any info also is there a custom rom with version 6 i can only seem to oreo roms now?
thanks in advance

ra5ta said:
I have installed android 8 but my bluetooth does not work how do i downgrad to 6 or 7 i have tried to search but cant find any info also is there a custom rom with version 6 i can only seem to oreo roms now?
thanks in advance
Click to expand...
Click to collapse
First i think you need downgrade youe HU with SD_Firmware_Tool.exe then install any custom rom like [ROM][PX5][HD] Malaysk ROMs for any yet known MTCD-Device

cant install android 6 roms
iRcKenny said:
First i think you need downgrade youe HU with SD_Firmware_Tool.exe then install any custom rom like [ROM][PX5][HD] Malaysk ROMs for any yet known MTCD-Device
Click to expand...
Click to collapse
Trying to install malayksandroid 6 rom i get error
====update rkiimage===
find and check firmware...
!!!please keep your usb cable or dc-in connected !
check parameter..
e:Check failed at: 0x4
its a klyd unit i have upgraded the som board from px3 to px5 not sure if this makes a differance ?
i have tried a few other android 6 roms get the same result

ra5ta said:
Trying to install malayksandroid 6 rom i get error
====update rkiimage===
find and check firmware...
!!!please keep your usb cable or dc-in connected !
check parameter..
e:Check failed at: 0x4
its a klyd unit i have upgraded the som board from px3 to px5 not sure if this makes a differance ?
i have tried a few other android 6 roms get the same result
Click to expand...
Click to collapse
Be sure to using a small 1/2gb sdcard fat32 filesystem. If you still having troubles try marchnz [PX3 & 5] [OTG] - No Headunit Mod, recover or flash a SOM with a simple USB cable

Related

I need to rollback (Honor 8), HELP!

I have a seemingly stupid but still annoying problem. As many of you know Android 8 + EMUI 8 came out this summer and I have updated my Honor8. Everything works well, even better (especially with regard to the battery) apart from a problem, quite annoying. I have seen that everyone around complains about the same problem, so it is clear that both a build bug and not a local problem.
Basically ... the bluetooth link with the multimedia system of my car doesn't work as it should, while it worked well with the 7.0.
Tracknames, music infos disappears, sometimes it connects regularly, starting the music, sometimes nothing happens, sometimes the music passes from the car speakers to smartphone (!!)... in short, manage the music in the car It has become a big problem!
I tried all possible options; reset pairing, reset bluetooth, clear cache, activate the developer options to control some low-level aspects of bluetooth, and finally installed Bluetooth Auto Connect which also has several advanced options. Nothing works. In the meantime an update of 8.0 has been released (mine is the buiold 521). The update came out in September ... maybe (MAYBE) this update fixes all bluetooth issues (but i don't have any detailed info about). Until today I have not received any updates and normally I check new version regularly every day. At this point I decided to return to Nougat!
And here the adventure begins!
I CANNOT IN ANY WAY do the downgrade.
What I tried:
- through HiSuite. The "back to previous version" option appears random (rarely); normally the program tells me "the system is up to date". Once appeared I tried to run the procedure, but after the decompression it gives me an error "error updating".
- by standard Rollback procedure. Using a microSD and putting the full version of Nougate in the dload folder. The installation starts but stops almost immediately with the same "update cannot be applied" error.
At this point I am desperate. I cannot update Oreo, I can't go back to Nougat and meanwhile the bluetooth still doesn't work with my car. Remember that before Oreo, everything worked very well!
What can I do? Can you help me?
Thank you
hi / i can help u / pls say me this:
your region(Ru/Eu/Cn.......)
your model( FRD-L09/L19/L04........)
Your Build number
and which build you upgrade to emui 8
m2relax said:
hi / i can help u / pls say me this:
your region(Ru/Eu/Cn.......)
your model( FRD-L09/L19/L04........)
Your Build number
and which build you upgrade to emui 8
Click to expand...
Click to collapse
Region: EU
Model: FRD-L09
Build: 8.0.0.521 (C432)
Previous Build: don't remember. It was Nougat, and I've upgraded around the first week of September. From that day I haven't received/applied any patch, because nothing appears until now.
This morning I've tried again with HiSuite. As usual it says I'm running the latest version and it doesn't offer any downgrade option .
Thelothian said:
Region: EU
Model: FRD-L09
Build: 8.0.0.521 (C432)
Previous Build: don't remember. It was Nougat, and I've upgraded around the first week of September. From that day I haven't received/applied any patch, because nothing appears until now.
This morning I've tried again with HiSuite. As usual it says I'm running the latest version and it doesn't offer any downgrade option .
Click to expand...
Click to collapse
dont worry/ do u change region of your phone past?
m2relax said:
dont worry/ do u change region of your phone past?
Click to expand...
Click to collapse
Never. And never jailbroken or rooted...
Thelothian said:
Never. And never jailbroken or rooted...
Click to expand...
Click to collapse
ok / pls do this work step by step :
1-Get Unlock Code for your Phone
2-Unlock your phone with Unlock Code
3-install TWRP recovery
4-after install TWRP notice me to send a file for u ( u must flash it from recovery TWRP )
5-after flashing u most install recovery stock
6-End and your problem is done! :fingers-crossed:
m2relax said:
ok / pls do this work step by step :
1-Get Unlock Code for your Phone
2-Unlock your phone with Unlock Code
3-install TWRP recovery
4-after install TWRP notice me to send a file for u ( u must flash it from recovery TWRP )
5-after flashing u most install recovery stock
6-End and your problem is done! :fingers-crossed:
Click to expand...
Click to collapse
I Heard TWRP doesn't work well on Oreo...
CurlyApple said:
I Heard TWRP doesn't work well on Oreo...
Click to expand...
Click to collapse
no if you use multi tools 8 for install twrp its work perfectly on oero
m2relax said:
no if you use multi tools 8 for install twrp its work perfectly on oero
Click to expand...
Click to collapse
The more you know...
Finally I've decide to try updating to 8.0.0.562. After a month of tries, fails (damn Huawei and his stupid update system), errors and a lot of other stupid things, I was finally able to update my Honor hoping the latest version will fix all the problems. It was a enormous waste of time (searching around internet)... but in the end I found a method described here: https://forum.xda-developers.com/huawei-p20-pro/help/p20-pro-bricked-t3868085#4And if you go ahead you should find the correct firmware link (on a Russian site). Although, IMHO, failing with the classic method was due to the impossibility or some bugs in the update system, to unpack the update files on sdcard. So the solution seems to be to leave both the zip and the unpacked folder.The problems with bluetooth remain, but I hope that now there is not to be crazy applying next updates. ATTENTION: the method above is NOT valid for rollback! If you try, you'll brick your Honor.
And finally I've taken an important decision... for me this is the last Huawei/honor device. Next time I'll go to another brand, with a serious update system.
Hello,
I have the same problem whit my honor, bluetooth lost signal random times, and my battery is faster get low, on android 7 i dont feel thees problems. Anyone have an idea how can i downgrade to nougat or marshmallow? My phone infos:
-FRD-L09 8.0.0.521(C432), I bought it in Hungary (i think its an EU modell), the phone have an unlocked bootloader, and flashed whit TWRP recovery
Who know the solution, pls reply here or, write me an email. Big thanks
scseke said:
Hello,
I have the same problem whit my honor, bluetooth lost signal random times, and my battery is faster get low, on android 7 i dont feel thees problems. Anyone have an idea how can i downgrade to nougat or marshmallow? My phone infos:
-FRD-L09 8.0.0.521(C432), I bought it in Hungary (i think its an EU modell), the phone have an unlocked bootloader, and flashed whit TWRP recovery
Who know the solution, pls reply here or, write me an email. Big thanks
Click to expand...
Click to collapse
flash this file with twrp and install stock recovery and do reset factor / finally use hisuite to rollback

right update file?

Hello
I have a px30 android navi with mtce "software" it is Android 8.1
i found now on the https://yadi.sk/d/umCvHqCDzHccr page the folder RockChip PX30 Android 9.0
Is it posibill to update my radio with this file?
If not..is there a other update to android 9?
if i am not happy...is there a solution to make a nandroid backup from my Radio in the status from now?
Thanks for help
If your headunit is a PX30, then maybe.
Your "dcmu" under settings should look something like this i guess: MTCE_??_?.?? (mine for example is MTCE_MX_3.06) In your case it should state GS
As of my current knowledge, there is no root for 8.1 devices yet, just 8.0 and below (with the custom roms from hal9k or malaysk).
deadmeiker said:
Hello
I have a px30 android navi with mtce "software" it is Android 8.1
i found now on the https://yadi.sk/d/umCvHqCDzHccr page the folder RockChip PX30 Android 9.0
Is it posibill to update my radio with this file?
If not..is there a other update to android 9?
if i am not happy...is there a solution to make a nandroid backup from my Radio in the status from now?
Thanks for help
Click to expand...
Click to collapse
Hi,
Did you manage to upgrade to Android 9.0? I have tried several times but have been unable to do it. Always end up getting an error message.
Cheers.
No.. I wase to scary to brick my device

How to return from hal9k to original software

Dear all
I have chs px6 rk3399 with original android 9 , i flash hal9k software and i like to return to the original software i have the software and try with SDcard Usb and it refused to install "regestred error" is there any way please.
nokiagird said:
Dear all
I have chs px6 rk3399 with original android 9 , i flash hal9k software and i like to return to the original software i have the software and try with SDcard Usb and it refused to install "regestred error" is there any way please.
Click to expand...
Click to collapse
This is what I did some time ago: I put the stock firmware in a SD card (at that moment it was the latest update HA2_rk3399_9.0_ota(20191210)升级包.zip) and flashed it, then everything was back to stock. :good:

Brick px5(solved) and installing Android 10 ROM(please help)

Hi, I installed the mcu files by mistake and now the device is bricked and does not come up. It only gets stuck on the boot image. What is the solution? (How should the recovery file be injected into it?
Px5 unit head
I have tried many times with the reset button and it does not enter the recovery mode
If you have an MCU MTCD/E:
Instructions for entering the recovery are in the video:
If you can't get into recovery, try PX5 stuck in bootloop:
PX5 stuck in bootloop
This Post details how OTG/LOADER can be achieved to recover a corrupt PX5 or PX3 - any RockChip MTCx SOM Update 2/2018 - anyone can make a gig without modifying their main board. BUT FIRST try a USB port, some have OTG out of the box. From...
forum.xda-developers.com
The last option is to buy a processor board, the functionality of bluetooth and wifi is not guaranteed:
https://www.aliexpress.com/item/32840635444.html?spm=2114.12010615.8148356.45.b08425f6mrqGdk
Good luck
aliak122 said:
Hi, I installed the mcu files by mistake and now the device is bricked and does not come up. It only gets stuck on the boot image. What is the solution? (How should the recovery file be injected into it?
Px5 unit head
Click to expand...
Click to collapse
Is the device MTCD? Post MCU version.
Thank you all, friends of the device, it was fixed. But I just wanted to install the official Android 10 ROM via microsd, which unfortunately I still can't install. My mcu version is kld and I flashed the chs via sddisktool because the Android 10 version for kld has not been released. !!
Is there an installation solution via microsd?
aliak122 said:
Thank you all, friends of the device, it was fixed. But I just wanted to install the official Android 10 ROM via microsd, which unfortunately I still can't install. My mcu version is kld and I flashed the chs via sddisktool because the Android 10 version for kld has not been released. !!
Is there an installation solution via microsd?
Click to expand...
Click to collapse
But when I connect the microsd to the device, nothing happens.

I can't connect to pc after downgrading

i installed gms with downgrade from emui 11 to emui 10.1 and then i cant connect to pc and the now usb is not working tried debugging usb still no luck
any solution?
Update back to emui11 after you install GMS and conection will be fine. Use search function, because this problem is not new.
thanks i will try
badmania98 said:
Update back to emui11 after you install GMS and conection will be fine. Use search function, because this problem is not new.
Click to expand...
Click to collapse
Hello.
I`ve got an question.
For some Days ago i make an Downgrade from the 196 Firmware an my P40 Pro.
The strange on the Downgrade is, that i hadn´t lost of the USB connection.
But imake the downgrade from the 11.0.0.196 to the 10.1.0.176.
This was the official procedure on the HiSuite untill the 11.0.0.176 firmware.
The Downgrade to the 121 Firmware i makes obove the Dload variant without lost the USB connection.
I have the same issue "usb is not working" I upgrade back to Emui 11 but still the USB isnt working - can you guide me how to solve it please?
UPDATE: It asked me to install another update - this solved the issue
yosiraz said:
I have the same issue "usb is not working" I upgrade back to Emui 11 but still the USB isnt working - can you guide me how to solve it please?
UPDATE: It asked me to install another update - this solved the issue
Click to expand...
Click to collapse
Read Notes no. 5 here.

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