[GUIDE] Android 8 API27 SUPERMOD for YT9216BF YT9216CFJ YT9216BJ YT9216BFJ YT9216CJ - root, Viper4Android, TWRP, Custom UI, brick recovery and more

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Emilson

Senior Member
Jun 6, 2012
156
45
POLAND
@ExtremeMOD
Hoping you can help me out with this.

I have YT9216CJ Tesla Style unit. 2G+32
I've followed the video tutorial all the way to the bonus (There is an instructional gap in the bonus. I left comment on vid)
I go to install new firmware as instructed. Download completes in about 2.5 minutes.
However, it never boots again. Instead it flashes the initial Mitsubishi Logo, screen glitches a bit. I've waited over an hour but it never boots into Android.
I have restored my original backup per the instructions and everything is fine there.

I also saw in a different thread for the Android 6 variants that the software wasn't for "HIFI" models. Is this still the case?

Any help would be appreciated.
this firmware is definitely not compatible with your model mainly because of resolution/screen orientation, but probably you can use the files from this thread to just get root.
Just by flashing recovery.img with TWRP recovery and installing the magisk root .zip package through it, if only that you need.
(Not sure about screen orientation in TWRP recovery mode)
Although I don't know what you expect from root.
 
Last edited:

brownrt

Senior Member
Dec 1, 2008
164
22
Washington, DC
this firmware is definitely not compatible with your model mainly because of resolution/screen orientation, but probably you can use the files from this thread to just get root.
Just by flashing recovery.img with TWRP recovery and installing the magisk root .zip package through it, if only that you need.
Although I don't know what you expect from root.
A few things. I want to be able to:
1. Use a 5ghz wifi adapter.
2. I was hoping the new firmware would fix the intermittent HVAC control issues I am having.
3. Hoping to address statement issues that prevent the installation/playback on Netflix, HBO, etc.
4. Root should help me sort out issues using my iPod I think. Right now the unit does not recognize that it is even bugged in.
5. Automating some tasks via tasker.

Either way, this is a good suggestion. Gonna try now.
 

Emilson

Senior Member
Jun 6, 2012
156
45
POLAND
A few things. I want to be able to:
1. Use a 5ghz wifi adapter.
2. I was hoping the new firmware would fix the intermittent HVAC control issues I am having.
3. Hoping to address statement issues that prevent the installation/playback on Netflix, HBO, etc.
4. Root should help me sort out issues using my iPod I think. Right now the unit does not recognize that it is even bugged in.
5. Automating some tasks via tasker.

Either way, this is a good suggestion. Gonna try now.
1.,4., that's because it still doesn't support usb otg. From what I've seen it supports it correctly in android 12, wich will never be released for 822L.
2. you should look for the latest 'official release' firmware for your unit to fix that.
5. Yep, Root can help you with this.

Ps. To reboot in recovery mode use some 'android terminal emulator' with command 'reboot recovery'. if you dont have other options.
 
Last edited:

brownrt

Senior Member
Dec 1, 2008
164
22
Washington, DC
1.,4., that's because it still doesn't support usb otg. From what I've seen it supports it correctly in android 12, wich will never be released for 822L.
2. you should look for the latest 'official release' firmware for your unit to fix that.
5. Yep, Root can help you with this.

Ps. To reboot in recovery mode use some 'android terminal emulator' with command 'reboot recovery'. if you dont have other options.
Looks like the same issue that prevent the custom firmware from loading also prevents TWRP from displaying properly. neither the 2GB or 1 GB version work.

I was able to reflash my original recovery.
 

robbyastra

Member
Nov 12, 2022
8
0
Maybe I'm tired, but I see nothing resembling a "requirements" on the first page of this forum thread. It maybe worth explicitly stating that there. Do you have any suggestions? I think my issues may be resolved if I can just get the unit rooted.

@robbyastra you have the same style unit as me so it's probably not worth the effort you are going through to get it connected.
Yes it would seem our units are the same.

It's a shame we can't get a decent mod onto our HU's - I thought this might have been it.
Thank you @ExtremeMOD for the help.
I was using laptop on mains power and I turned off all power saving features so I'm not sure what the problem is. I'll try the 2 second trick you mentioned.

How can I check and amend the COM port config?
Also, I was doing this in the car using the car battery... Just disconnecting and then connecting the HU when needed. Could that cause any issue?

I'd still like to complete this first step as regardless of everything, I'd still like a backup .
 

ExtremeMOD

Senior Member
Aug 14, 2020
1,048
243
London
extrememod.co.uk
Maybe I'm tired, but I see nothing resembling a "requirements" on the first page of this forum thread. It maybe worth explicitly stating that there. Do you have any suggestions? I think my issues may be resolved if I can just get the unit rooted.

@robbyastra you have the same style unit as me so it's probably not worth the effort you are going through to get it connected.

Thank you for pointing this out - it seems that we forgot to include them. The original post has been now updated, right after the Disclaimer.
 
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Reactions: brownrt

Mac1ne

Member
Nov 27, 2022
8
1
Hi all,

If you want to greatly improve the way your head unit works, sounds and looks like - you've come to the right place!

Why install this?
With this package you will greatly improve:
  • Stability
  • Speed
  • User Interface
  • Sound tweaking options
  • Customisation options
View attachment 5383193 View attachment 5383199 View attachment 5383195 View attachment 5383197

  • ON PHYSICAL BUTTONS: this software has only been tested on head units with no physical buttons (like volume) | Before making any changes, access the CAR SETTINGS -> FACTORY SETTINGS -> ENCODER SETTINGS on your head unit and take a screenshot of the current settings (see example below). After installing the package, go back to these settings and adjust them if needed. If that doesn't help and if you can't successfully re-calibrate the buttons after installing the firmware, restore your backup

    View attachment 5400709

Disclaimer
I do not create the software itself but rather use research and put together different mods and hacks into one package that includes very user-friendly step-by-step instructions on how to install it all. You will find the links to original posts in the instructions pdf's if credit is due. The software might include smaller changes made by me and has been fully tested in real units.

This firmware works on the following 1Gb RAM and 2 Gb RAM units with fake Android 8.1, 9.0, 9.1, 10 and Android 11 installed, with screen resolution of 1024x600 px. It will not work on Tesla-style units:

- YT9216BF | YT9216CFJ | YT9216BJ | YT9216BFJ | YT9216CJ

!! TAKE A PICTURE OF YOUR SYSTEM INFO AND KERNEL VERSION BEFORE DOING ANYTHING TO YOUR HEAD UNIT !!


View attachment 5423637 View attachment 5383201

The zip file package contains:
  • Modified firmware - courtesy of Stranger21UFA @ 4PDA (link to the original post)
  • TWRP (separate folders for 1GB and 2GB RAM units)
  • Root via Magisk
  • Viper4Android
  • Car Launcher
  • Boot Animation
  • SEPARATE INSTRUCTIONS ARE INCLUDED IN EVERY FOLDER

>>>> ALWAYS BACKUP YOUR UNIT BEFORE MAKING ANY CHANGES TO IT <<<<

!! IMPORTANT !!

This is a fairly advanced installation process and will require you to follow the individual guides included in the software package - to the letter. Failing to do so, will (in "best" case) result in a slow and buggy head unit and in the worse case - brick it altogether.​


DOWNLOAD
YT9216BF * YT9216CFJ * YT9216BJ * YT9216BFJ * YT9216CJ - supermod software package & drivers

STEP-BY-STEP GUIDE (upgrading from working stock firmware):
  1. DO NOT SKIP ANY STEPS, AND INSTALL EVERYTHING IN THE CORRECT ORDER. STEPS 5 AND 6 ARE MOST CRITICAL.

  2. Proceed to download the software package for your unit and the drivers package in the same folder

  3. It's highly recommended to do these upgrades with your unit connected on your desktop, rather than in the car. Video Guide

  4. Install the Mediatek & ADB drivers on your Windows computer. Video Guide - use the same principle for ADB drivers.

  5. Backup your current system by exporting a full memory dump. Video Guide

  6. Import back your memory dump from step-5 to ensure it fully works. This is how.

  7. Install the package. Separate instructions are included in every folder of the downloaded zip file. Follow them by the order.

IF THIS SOFTWARE PACKAGE HAS BRICKED YOUR HEAD UNIT AND YOU HAVE YOUR BACKUP AVAILABLE, follow the steps below:
  1. DO NOT SKIP ANY STEPS, AND INSTALL EVERYTHING IN THE CORRECT ORDER.

  2. It's highly recommended to do these upgrades with your unit connected on your desktop, rather than in the car. Video Guide

  3. Install the Mediatek & ADB drivers on your Windows computer. Video Guide - use the same principle for ADB drivers - (download link is in the video description)

  4. Watch this video on Test Point recovery

  5. Import back your memory dump. This is how.

  6. If successful - try to install the software package again or stay with your original one

IF THIS SOFTWARE PACKAGE HAS BRICKED YOUR HEAD UNIT AND YOU HAVE NO BACKUP AVAILABLE, follow the steps below:
  1. Share the pictures of your System Info and Kernel in this thread and we'll try to help you



------------------------------------------

This post is being frequently updated and you'll find more guides and mods in our signature​

------------------------------------------

** IF YOU ARE UNABLE TO RESTORE YOUR UNIT, PLEASE CONSIDER DONATING IT TO US @ ExtremeMOD, SO WE CAN BUILD MORE MODS AND TUTORIALS


Thanks! And if this post is helpful to you please don't forget to "like" it.

Enjoy!​


[V4A][VIPER4ANDROID][ViperFX][ROOT][TWRP][8227L][YT9216BF] [YT9216CFJ] [YT9216BJ] [YT9216BFJ] [YT9216CJ]
The link has no software to install, only drivers.
 
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ExtremeMOD

Senior Member
Aug 14, 2020
1,048
243
London
extrememod.co.uk
The link has no software to install, only drivers.

Just tried it and it's all there:

Screenshot 2022-11-27 173639.png
 

Mac1ne

Member
Nov 27, 2022
8
1
But my unit only has 1g ram…is it the same regardless. Here are my screenshots from the unit.
 

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Mac1ne

Member
Nov 27, 2022
8
1
would I be able to run the android 6 supermod version or may be update the firmware through xyauto?
 

rubens_look

Member
Apr 15, 2013
7
0
I'm really sorry to say this but if you got 9212B model, Equalizer, Fade and SUbWoofer control will not work as your head unit does not have a proper audio processing chip.

I have no mods for this unit because it's so incredibly bad, that it makes no sense trying to improve anything.

If you bought it recently, try to return it.

My friend, how are you? I'm back... lol... I replaced my chip with a TDA7850. The audio improved considerably and I was able to solve the problem with the radio application, which even at volume 0 it continued to output sound. Will I be able to install the MODS now or do I still not deserve it? Thank you again for your time
 

ExtremeMOD

Senior Member
Aug 14, 2020
1,048
243
London
extrememod.co.uk
My friend, how are you? I'm back... lol... I replaced my chip with a TDA7850. The audio improved considerably and I was able to solve the problem with the radio application, which even at volume 0 it continued to output sound. Will I be able to install the MODS now or do I still not deserve it? Thank you again for your time

As far as we can tell, your model isn't supported right now. Proceed at your own risk. As a side note: make sure to install active cooling for the TDA7850 or your head unit will burn up. In addition, you need to change the 100 nf capacitors leading to the speaker outputs on TDA7850 to 2,5 uf (should be 4 in total).
 

tutu104

New member
Nov 30, 2022
3
1
Hi all,

If you want to greatly improve the way your head unit works, sounds and looks like - you've come to the right place!

Why install this?
With this package you will greatly improve:
  • Stability
  • Speed
  • User Interface
  • Sound tweaking options
  • Customisation options
View attachment 5383193 View attachment 5383199 View attachment 5383195 View attachment 5383197 View attachment 5383203

  • ON PHYSICAL BUTTONS: this software has only been tested on head units with no physical buttons (like volume) | Before making any changes, access the CAR SETTINGS -> FACTORY SETTINGS -> ENCODER SETTINGS on your head unit and take a screenshot of the current settings (see example below). After installing the package, go back to these settings and adjust them if needed. If that doesn't help and if you can't successfully re-calibrate the buttons after installing the firmware, restore your backup

    View attachment 5400709

Disclaimer
I do not create the software itself but rather use research and put together different mods and hacks into one package that includes very user-friendly step-by-step instructions on how to install it all. You will find the links to original posts in the instructions pdf's if credit is due. The software might include smaller changes made by me and has been fully tested in real units.

This firmware works on the following 1Gb RAM and 2 Gb RAM units with fake Android 8.1, 9.0, 9.1, 10 and Android 11 installed, with screen resolution of 1024x600 px. It will not work on Tesla-style units:

- YT9216BF | YT9216CFJ | YT9216BJ | YT9216BFJ | YT9216CJ

!! TAKE A PICTURE OF YOUR SYSTEM INFO AND KERNEL VERSION BEFORE DOING ANYTHING TO YOUR HEAD UNIT !!


View attachment 5423637 View attachment 5383201

The zip file package contains:
  • Modified firmware - courtesy of Stranger21UFA @ 4PDA (link to the original post)
  • TWRP (separate folders for 1GB and 2GB RAM units)
  • Root via Magisk
  • Viper4Android
  • Car Launcher
  • Boot Animation
  • SEPARATE INSTRUCTIONS ARE INCLUDED IN EVERY FOLDER

>>>> ALWAYS BACKUP YOUR UNIT BEFORE MAKING ANY CHANGES TO IT <<<<

!! IMPORTANT !!

This is a fairly advanced installation process and will require you to follow the individual guides included in the software package - to the letter. Failing to do so, will (in "best" case) result in a slow and buggy head unit and in the worse case - brick it altogether.​


DOWNLOAD
YT9216BF * YT9216CFJ * YT9216BJ * YT9216BFJ * YT9216CJ - supermod software package & drivers

STEP-BY-STEP GUIDE (upgrading from working stock firmware):
  1. DO NOT SKIP ANY STEPS, AND INSTALL EVERYTHING IN THE CORRECT ORDER. STEPS 5 AND 6 ARE MOST CRITICAL.

  2. Proceed to download the software package for your unit and the drivers package in the same folder

  3. It's highly recommended to do these upgrades with your unit connected on your desktop, rather than in the car. Video Guide

  4. Install the Mediatek & ADB drivers on your Windows computer. Video Guide - use the same principle for ADB drivers.

  5. Backup your current system by exporting a full memory dump. Video Guide

  6. Import back your memory dump from step-5 to ensure it fully works. This is how.

  7. Install the package. Separate instructions are included in every folder of the downloaded zip file. Follow them by the order.

IF THIS SOFTWARE PACKAGE HAS BRICKED YOUR HEAD UNIT AND YOU HAVE YOUR BACKUP AVAILABLE, follow the steps below:
  1. DO NOT SKIP ANY STEPS, AND INSTALL EVERYTHING IN THE CORRECT ORDER.

  2. It's highly recommended to do these upgrades with your unit connected on your desktop, rather than in the car. Video Guide

  3. Install the Mediatek & ADB drivers on your Windows computer. Video Guide - use the same principle for ADB drivers - (download link is in the video description)

  4. Watch this video on Test Point recovery

  5. Import back your memory dump. This is how.

  6. If successful - try to install the software package again or stay with your original one

IF THIS SOFTWARE PACKAGE HAS BRICKED YOUR HEAD UNIT AND YOU HAVE NO BACKUP AVAILABLE, follow the steps below:
  1. Share the pictures of your System Info and Kernel in this thread and we'll try to help you



------------------------------------------

This post is being frequently updated and you'll find more guides and mods in our signature​

------------------------------------------

** IF YOU ARE UNABLE TO RESTORE YOUR UNIT, PLEASE CONSIDER DONATING IT TO US @ ExtremeMOD, SO WE CAN BUILD MORE MODS AND TUTORIALS


Thanks! And if this post is helpful to you please don't forget to "like" it.

Enjoy!​


[V4A][VIPER4ANDROID][ViperFX][ROOT][TWRP][8227L][YT9216BF] [YT9216CFJ] [YT9216BJ] [YT9216BFJ] [YT9216CJ]
Hi, I'm having issues getting the ram test to work in flash tool. I fallowed the extrememod video step by step and none of my computer seems to detect the device. I tried different computers, usb ports, USB adapters for the head unit ( both 6 pin and 4 pin) and inside/outside of the car. The unit is fully functional. Can anyone point me in the right direction?
 

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ExtremeMOD

Senior Member
Aug 14, 2020
1,048
243
London
extrememod.co.uk
Hi, I'm having issues getting the ram test to work in flash tool. I fallowed the extrememod video step by step and none of my computer seems to detect the device. I tried different computers, usb ports, USB adapters for the head unit ( both 6 pin and 4 pin) and inside/outside of the car. The unit is fully functional. Can anyone point me in the right direction?

You might have a version of the unit that requires to be connected to power after inserting the USB cable. This will not work in a car and has to be done on a desktop.

  • Following the instructions, insert the USB cable (use only 4 pin port) and after 2 seconds, connect the head unit to power

    If the above doesn't work then:

  • Check so that the drivers were correctly installed
  • Make sure your USB cable is shorter than 1m
  • Make sure not to use any USB-hubs, only straight connections
  • Do not use USB3 ports (the blue ones), only USB2 (normally black ones)
  • Your laptop should run Windows 7 or 10, Windows11 isn't officially supported
  • Turn off USB power management for your USB devices in the Windows Device Manager
 

tutu104

New member
Nov 30, 2022
3
1
You might have a version of the unit that requires to be connected to power after inserting the USB cable. This will not work in a car and has to be done on a desktop.

  • Following the instructions, insert the USB cable (use only 4 pin port) and after 2 seconds, connect the head unit to power

    If the above doesn't work then:

  • Check so that the drivers were correctly installed
  • Make sure your USB cable is shorter than 1m
  • Make sure not to use any USB-hubs, only straight connections
  • Do not use USB3 ports (the blue ones), only USB2 (normally black ones)
  • Your laptop should run Windows 7 or 10, Windows11 isn't officially supported
  • Turn off USB power management for your USB devices in the Windows Device Manager
Thank you very much for the answer, it might be because of the windows being 11 because I did try with power on the head unit. I will try on a older computer. My cable is quite long too but it's pretty good quality, I will try to get a shorter one too.
 
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Nov 30, 2022
8
3
Bună, am o unitate cu Android 11 (nu cred), cu versiunea F9212B_AHD_00020_V001, XY AUTO:F7.0(X2) DISPLAY 1024X600, MCU:4.2(X2) DDR:2GB ȘI FLASH:32GB, este dedicat pentru Ford C-Max 2008, și nu funcționează foarte bine, și văd pe site-ul XYAuto un firmware nou 7.3.7, dar este Android 10, și încerc să actualizez sau poate să fac downgrade :) știi dacă este corect sau nu?
De fapt, nu pot vedea toate opțiunile din canbus-ul mașinii mele, cum ar fi senzorii de climatizare sau de parcare, toate originalele din fabricație.
TKS in advance,Cosmin.
 

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  • 1
    which guide to follow?
    my android head unit is yt9216bj
    i have "android 9.0p" install and is very buggy.it's possible to stock android 8
    and whih one.

    can you help me?

    Your Android is already version 8. Our software should be compatible. Make sure to make full backup and follow the instructions to the letter.
  • 26
    Hi all,

    If you want to greatly improve the way your head unit works, sounds and looks like - you've come to the right place!

    Why install this?
    With this package you will greatly improve:
    • Stability
    • Speed
    • User Interface
    • Sound tweaking options
    • Customisation options
    20210805112900.jpg 20210805091905.jpg 20210805091639.jpg 20210805091836.jpg 20210805112820.jpg

    • ON PHYSICAL BUTTONS: this software has only been tested on head units with no physical buttons (like volume) | Before making any changes, access the CAR SETTINGS -> FACTORY SETTINGS -> ENCODER SETTINGS on your head unit and take a screenshot of the current settings (see example below). After installing the package, go back to these settings and adjust them if needed. If that doesn't help and if you can't successfully re-calibrate the buttons after installing the firmware, restore your backup

      encoder settings.png

    Disclaimer
    I do not create the software itself but rather use research and put together different mods and hacks into one package that includes very user-friendly step-by-step instructions on how to install it all. You will find the links to original posts in the instructions pdf's if credit is due. The software might include smaller changes made by me and has been fully tested in real units.

    This firmware works on the following 1Gb RAM and 2 Gb RAM units with fake Android 8.1, 9.0, 9.1, 10 and Android 11 installed, with screen resolution of 1024x600 px. It will not work on Tesla-style units:

    - YT9216BF | YT9216CFJ | YT9216BJ | YT9216BFJ | YT9216CJ

    !! TAKE A PICTURE OF YOUR SYSTEM INFO AND KERNEL VERSION BEFORE DOING ANYTHING TO YOUR HEAD UNIT !!


    Screenshot_20181015-082542.png 20210805092140.jpg

    The zip file package contains:
    • Modified firmware - courtesy of Stranger21UFA @ 4PDA (link to the original post)
    • TWRP (separate folders for 1GB and 2GB RAM units)
    • Root via Magisk
    • Viper4Android
    • Car Launcher
    • Boot Animation
    • SEPARATE INSTRUCTIONS ARE INCLUDED IN EVERY FOLDER

    >>>> ALWAYS BACKUP YOUR UNIT BEFORE MAKING ANY CHANGES TO IT <<<<

    !! IMPORTANT !!

    This is a fairly advanced installation process and will require you to follow the individual guides included in the software package - to the letter. Failing to do so, will (in "best" case) result in a slow and buggy head unit and in the worse case - brick it altogether.​


    DOWNLOAD
    YT9216BF * YT9216CFJ * YT9216BJ * YT9216BFJ * YT9216CJ - supermod software package & drivers

    STEP-BY-STEP GUIDE (upgrading from working stock firmware):
    1. DO NOT SKIP ANY STEPS, AND INSTALL EVERYTHING IN THE CORRECT ORDER. STEPS 5 AND 6 ARE MOST CRITICAL.

    2. Proceed to download the software package for your unit and the drivers package in the same folder

    3. It's highly recommended to do these upgrades with your unit connected on your desktop, rather than in the car. Video Guide

    4. Install the Mediatek & ADB drivers on your Windows computer. Video Guide - use the same principle for ADB drivers.

    5. Backup your current system by exporting a full memory dump. Video Guide

    6. Import back your memory dump from step-5 to ensure it fully works. This is how.

    7. Install the package. Separate instructions are included in every folder of the downloaded zip file. Follow them by the order.

    IF THIS SOFTWARE PACKAGE HAS BRICKED YOUR HEAD UNIT AND YOU HAVE YOUR BACKUP AVAILABLE, follow the steps below:
    1. DO NOT SKIP ANY STEPS, AND INSTALL EVERYTHING IN THE CORRECT ORDER.

    2. It's highly recommended to do these upgrades with your unit connected on your desktop, rather than in the car. Video Guide

    3. Install the Mediatek & ADB drivers on your Windows computer. Video Guide - use the same principle for ADB drivers - (download link is in the video description)

    4. Watch this video on Test Point recovery

    5. Import back your memory dump. This is how.

    6. If successful - try to install the software package again or stay with your original one

    IF THIS SOFTWARE PACKAGE HAS BRICKED YOUR HEAD UNIT AND YOU HAVE NO BACKUP AVAILABLE, follow the steps below:
    1. Share the pictures of your System Info and Kernel in this thread and we'll try to help you



    ------------------------------------------

    This post is being frequently updated and you'll find more guides and mods in our signature​

    ------------------------------------------

    ** IF YOU ARE UNABLE TO RESTORE YOUR UNIT, PLEASE CONSIDER DONATING IT TO US @ ExtremeMOD, SO WE CAN BUILD MORE MODS AND TUTORIALS


    Thanks! And if this post is helpful to you please don't forget to "like" it.

    Enjoy!​


    [V4A][VIPER4ANDROID][ViperFX][ROOT][TWRP][8227L][YT9216BF] [YT9216CFJ] [YT9216BJ] [YT9216BFJ] [YT9216CJ]
    4
    Below post is to show my respect & appreciation to iceblue1980 and in addition to share my experience that had for a few days while trying to make my unit better with above firmware.

    As I downloaded firmware package, I chose not to follow his guide by letter & skip a few steps, for example & most important, not to take full back up of memory.
    Then disaster followed, as I almost bricked the unit.
    So I turned back to post/s to find solutions. Iceblue1980 was there, day & night responding to me & sending me several alternatives to try.
    He even volunteered to fix my unit by sending it to him without any money even if he had to spend valuable time for it.
    Finally, after several attempts & lots of files / firmwares / guides he sent me the gold package & we made it work !!!

    I carefully followed his last guide by letter & that was it.

    Now my unit is back to life & even better than ever.

    This guy is awesome & I personally thank him so much.

    To all members, PLS FOLLOW author's
    guides BY LETTER EVERYTIME to avoid surprises !!!!
    AND
    Don't forget to thank the people who are there for you day or night.
    They use lot of their personal time to be there for you & that is priceless !!

    :) :) :) :)
    2
    The links go to a '404' page.
    I did the first step as per the guide then did a factory reset. I then installed TWRP and rebooted then unit. Then I ran the 'reboot recovery' command in the terminal emulator and the unit rebooted, but it only shows the logo, some vertical lines on the bottom half of the screen, then a black screen and hangs there.

    I can still reboot normally and the unit will run.

    Separately, when resuming audio tracks after key-off, the audio is very choppy and unusable. Both bluetooth audio and the music app behave the same.

    To recover, I have to reset the unit and then the audio is ok.

    Also there's a very loud audio boom on start up and shutdown of the unit. This is not there in the stock firmware.View attachment 5409085

    Thank you for sharing these details. I'm afraid your head unit is not compatible with any of my software packages. If you haven't done so already, please revert back to factory firmware to avoid issues.
    2
    View attachment 5405715my board is this where is the recovery pin ? And where I conect an antenna for wifi

    These are the recovery test points:

    IMG-20210909-WA0006.jpeg

    The Wifi/BT antenna mod is shown here, however I plan to post a proper guide on this particular mod in the future.
    2
    The method I had to use slightly differs from everything I have read.

    1.) I wired a toggle switch to my positive lead. Left it in the off position (no power to head unit)

    You could share a picture of your soldered button. Some folks here might find it helpful :)

    I'm thinking of making a guide going for a permanent mod, where the soldered tactile SMD button will be accessible through a small hole in the back of the head unit (similar to how you access the RESET button). That way you can use a 'needle' to short the test points, rather than picking the unit apart every time.