How To Guide [ROOT] [FLASH STOCK]

[R41N MuTT]

DISCLAIMER:
Please post failures and successes. Keep it relevant, everything else to the DMs please. It makes it easier for others to Q&A. Everyone thanks you for your understanding.

***IF YOU ARE NEW BEWARE!!! BEFORE YOU CHANGE ANYTHING MAKE A BACKUP. LET THIS APPLY TO EVERYTHING. WHENEVER THE OPTION TO BACKUP IS AVAILABLE IT WOULD BE WISE TO DO SO. FAILURE TO BACKUP YOUR DEVICE WILL RESULT IN LOSS OF DATA***

ALL LINKS ALLOWED, APPROVED AND/OR UTILIZED BY XDA. SPECIAL THANKS TO ALL THE DEVS WHO CREATED THE TOOLS WITHOUT WHICH THIS WOULD NOT BE POSSIBLE. I DIDN'T BUILD ANY SOFTWARE MENTIONED IN THIS POST. IF YOU BRICK YOUR PHONE, DO NOT BLAME ME. I'M NOT TELLING YOU HOW TO DO IT, BUT NARRATING A GUIDE TO HOW I DID IT. YOU HAVE BEEN WARNED
REVVL V+ 5G TMOBILE VARIANT ANDROID 11

IT SHOULD BE NOTED THAT SOME PEOPLE ARE REPORTING LOSING WIFI AFTER ROOT, AS HAVE I. I HAVE NOT YET FIGURED OUT HOW TO FIX THIS. I'M THANKFUL FOR ANY ASSISTANCE. FLASHED STOCK BOOT_A DIDN'T FIX IT, ONLY FLASHING BACK TO STOCK ROM. ON ANOTHER IDENTICAL PHONE DIDN'T LOSE WIFI. YOUR GUESS IS AS GOOD AS MINE. LOOKING INTO IT, NO PROMISES

Without further ado, let's start at the unboxing.

1) PREP PHONE:
power on. navigate to settings>about phone and tap "build number" seven times to enable developer options.
navigate to settings>system>developer options and enable "USB Debugging" and "OEM unlock"
FIRST disconnect the device from your comp THEN power the device off.

2) DONWLOAD PYTHON & DRIVERS:
Python
BE SURE TO TICK THE BOX THAT SAYS ADD PYTHON TO PATH and install.
Download and install mediatek drivers from here:
Mediatek USB drivers
Download and install UsbDk from here:
UsbDk
Download MTK client from here:
MTK client
and extract to the desktop. Open the folder and move everything to
C:>Users>[username]>AppData>Local>Programs>Python>Python310
In the 310 directory press Alt + D to highlight your directory path and type CMD and hit enter. This opens a command prompt in the Python310 directory.
In cmd type this command without "":
"python setup.py install"
Go make a sandwich. Preferably turkey with mustard.
When you finish your sandwich, come back and type this command without "":
"python -m pip install -r requirements.txt"
Do not exit the command window.

3) BOOT INTO B ROM MODE:
This is kind of tricky when you don't know it. The screen will will be black. Sometimes, the device will not even vibrate. There's no sunbathing android, no "No Command", no fastboot, no download mode, no recovery- nothing, nada, zip, zilch, goose egg.
Make sure you unplug the device entirely from charger and pc BEFORE you power off. Now that you properly powered off, hold ONLY BOTH volume + - keys while you connect it to your PC. Try to be quick about it. DO NOT TOUCH THE POWER KEY. Continue to hold the volume keys until you know your device connected. When you hear your device connected jingle immediately let go. The screen will remain blacked out and unresponsive. It's normal.
Let's make sure we did it right. Enter the following command without ":
"python mtk e metadata,userdata,md_udc"
Disconnect and power on. If the device has been reset, then you have confirmation.

4) PREP PHONE AGAIN (STEP 1):

5) UNLOCK BOOTLOADER:
Enter the following command without ":
"python mtk da seccfg unlock"

~To relock the bootloader in the future use command "python mtk da seccfg lock". If you flash a custom recovery/ROM and want to return to stock, then you must unroot with magisk first, then flash stock ROM with SP flash tool at the end of this post~

Power on. On the splash screen you will see system type:
"Orange State
Your device is corrupted. Device has been unlocked and cannot be trusted. Press Power key to boot.
Will Reboot in 5 seconds."
This will happen each time you boot the device because your bootloader is now unlocked.

6) PREP PHONE AGAIN (STEP 1):

7) ENABLE ADB FASTBOOT COMMANDS:
Download sdk platform tools here:
sdk platform tools
Extract.
Navigate to the platform tools folder and type Alt+D to highlight directory and type CMD to open a cmd window in platform tools.
Connect device to pc and choose file transfer.
Enter the following command without ":
"adb devices"
A prompt will appear on your phone, click allow.
Enter the following command (again) without ":
"adb devices"
First you'll see a random, arbitrary number. Second time you should see your device serial number and "Authorized", "Allowed", or "Device".
Keep this cmd window open.

8) DOWNLOAD MAGISK AND PATCH BOOT IMG:
Download Magisk from here:
Magisk
Move it to your phone and install. You'll need to allow the installation from unknown sources.

Download firmware from here:
T-Mobile_REVVL_V%252B_5G.zip

Unzip and move boot_a to the downloads folder on your phone.
On your phone, open Magisk and click install and choose boot_a.
Make sure magisk_patched file is in your phone's download folder.

In your platform tools cmd window enter the following command without ":
"adb pull /sdcard/Download/magisk_patched_[numbers].img"

9) ENTER FASTBOOT MODE:
Disconnect device and power off. Hold Vol - and power to enter fastboot mode.
Connect device to PC.

10) ACHIEVE ROOT:
***NOTE: IN THIS STEP YOU MUST LOCATE THE PATCHED FILE ON YOUR PC AND COPY AS PATH. PASTE IT IN THE CMD WINDOW IN PLACE OF "[path to patched file]"***
In the platform tools cmd window enter the following command without ":
"fastboot flash boot [path to patched file]"

Now that you've achieved root, you can play around a little bit. But be careful what you go deleting if you get debloat happy like me and delete your NVRAM & wifi. Just in case you do, here's how to return to stock.

NVRAM backup. This video makes it look easy as pie. (It IS easy)
NVRAM Backup Tutorial
Now we have to bypass DA else SP flash tool will not be able to flash ROM.
Open cmd window and type the following without "":
"python -m pip install pyusb pyserial json5"
Then, update by entering the following command without "":
"python.exe -m pip install --upgrade pip"

Download LIBUSB:
LIBUSB

Run LIBUSB Win 32 filter installer and select Mediatek driver

Enter B ROM mode and connect to PC
Navigate to bypass tool and open "brom.bat"
Close cmd...

Run "flash_tool.exe" in sp flash folder
Options>options>connection tick UART

That's it. Now you can flash with sp flash without encountering error

Here is a helpful link that came from a senior mod:
mtk tool

Download SP Flash tool here:
SP Flash
Extract and launch flash_tool application

Download scatter mt6833 here:
MT6833_scatter.txt

Download bypass tool from here:
bypass tool

download rom2box:
rom2box

Download OTA and use a payload dumper to extract boot and scatter. You can also get DA, but it does nothing. You must bypass DA in order to flash ROM.
OTA

THIS SECTION IS FOR LATER REFERENCING, DISREGARD ANYTHING BELOW THIS
[A13 ota news https://www.t-mobile.com/support/devices/software-updates/t-mobile-revvl-v-plus-android-update]

[Twrp https://www.xda-developers.com/twrp-3-6-0-release-android-11-support/?_ga=2.195721068.1777813512.1675477697-1767133243.1662515191]
~fastboot set_active other
~fastboot flash recovery_a twrp file
~fastboot flash recovery_b twrp file
[Sprout https://dl.twrp.me/sprout/]
https://forum.xda-developers.com/t/guide-porting-twrp-without-source.3843473/
https://www.mediafire.com/download/sxq4cz8bddmr49
https://www.mediafire.com/file/irigs9iviy3sobw/T-Mobile_REVVL_V%2B_5G.zip/file
https://download1526.mediafire.com/ih0pus48i1kg/mwl6h20noutg005/revvplus.zip

[Patched boot_a pending verification https://forum.xda-developers.com/attachments/magisk_patched-25100_hiu69-img.5648347/]

[FLASH STOCK MODEM FILE]

My next guide will be how to use assurance wireless with ANY phone. I'm using assurance wireless on my Oneplus N200 (DE2118).

 

[smuskat]

Hi. I read many posts of yours regarding the REVVL V+ 5G, I was encouraged by your progress, and took comfort that someone else had some of the same struggles that I did. I was able to unlock the bootloader, I was able to root the phone (using an img file posted by someone else here; I hadn't yet read your root recipe), but I was no longer able to connect to wifi. (is this familiar?) In trying to undo the mess, I ended up making my phone unbootable.
I wanted to install stock ROM from scratch. I read your instructions, but there's no scatter file in the ROM that you posted. So I'm confused.
I figured that I could install the stock ROM zip via TWRP; I googled and found a TWRP for "Sprout" (the codename of our device), but for the life of me I couldn't install it on my phone, no matter what I tried.
You're ahead of me here; perhaps you can get me on track. Right now, my phone isn't booting at all.

Thank you!

 

[R41N MuTT]

Hi. I read many posts of yours regarding the REVVL V+ 5G, I was encouraged by your progress, and took comfort that someone else had some of the same struggles that I did. I was able to unlock the bootloader, I was able to root the phone (using an img file posted by someone else here; I hadn't yet read your root recipe), but I was no longer able to connect to wifi. (is this familiar?) In trying to undo the mess, I ended up making my phone unbootable.
I wanted to install stock ROM from scratch. I read your instructions, but there's no scatter file in the ROM that you posted. So I'm confused.
I figured that I could install the stock ROM zip via TWRP; I googled and found a TWRP for "Sprout" (the codename of our device), but for the life of me I couldn't install it on my phone, no matter what I tried.
You're ahead of me here; perhaps you can get me on track. Right now, my phone isn't booting at all.

Thank you!

Hey, I finished the guide. You can return to stock following the guide above. As you may have noticed I edited this message instead of posting again. It's okay, cause I brought good news, right? Cheers

 

[smuskat]

i totally forgot, yeah, i will look up the proper method to install twrp. it's supposed to be easy. i thought i was going to have to port twrp-and i still might- so i'm looking into it. i need to flash twrp myself. there is supposed to be a way to use rom2box or spflash or twrp or something to make a flashable zip. i don't know if that's a thing. it seems to me somebody needs to build a preinstaller that automatically flashes each img. for you. like a 1 click. if we can get twrp on this, that's the next step. to make a flashable zip. or somehow one click installer. i imagine if i did, it would only work for this phone, but could be modified for similar devices. i know tcl has a software like that. they plug a phone up and click one button. on their end it's one folder and that program does the rest. that program is what i want to write. reverse engineer this shiz and get a complete understanding of it. i know good and well the folks at tcl aren't sitting on a cmd window using adb to flash dozens of duplicate images time and time again for each device they build. it's screw it together, plug it up, click a button and test. they already have all the files preloaded and they have a preinstaller that pretty much instantly flashes the software. damn, wouldn't it sure be nice to have? but i don't foresee anybody leaking it any time soon. maybe if you have the cheese

Download TWRP for sprout

Download TWRP Open Recovery for sprout

dl.twrp.me

 

[R41N MuTT]

Download TWRP for sprout

Download TWRP Open Recovery for sprout

dl.twrp.me

Did you see this? https://www.xda-developers.com/twrp-3-6-0-release-android-11-support/

 

[smuskat]

Did you see this? https://www.xda-developers.com/twrp-3-6-0-release-android-11-support/

I looked; our REVVL does not seem to be listed in the list of supported devices.

I looked; our REVVL does not seem to be listed in the list of supported devices.

And may I ask for a clarification, please: You wrote above, "the firmware links i sent you- there should be at least 2 different ones, and an OTA... well, if you open the root folder and type 'scatter.txt' in the search bar it will pop up." In your post, I see 2 links to firmware; one is called https://www.mediafire.com/download/sxq4cz8bddmr49l, and one is called https://www.mediafire.com/file/irigs9iviy3sobw/T-Mobile_REVVL_V%2B_5G.zip/file. I downloaded both. I clicked on the downloaded file, and in the search bar, I searched for "scatter.txt", and got no results. What am i doing wrong? Thanks

 

[R41N MuTT]

I looked; our REVVL does not seem to be listed in the list of supported devices.

It needs to be ported still. Unless it's already ported I'm working on it now. Nightmare. I'm trying to follow a guide on here about porting TWRP... Going slow...

OTA

https://r4---sn-npoldn76.gvt1.com/packages/data/ota-api/package/72d80093722599cd459bca02504f22cbf3421dd2.zip?mh=Rs&pl=21&cm2rm=sn-8qj-i5ozd7r,sn-i3bdr7s&req_id=37ad1f0feba7fd94&cmsv=e&ipbypass=yes&rm=sn-8qj-i5olz7l&redirect_counter=3&cms_redirect=yes&mip=117.4.250.39&mm=34&mn=sn-npoldn76&ms=ltu&mt=1672034446&mv=m&mvi=4

Firmware

T-Mobile REVVL V+ 5G

MediaFire is a simple to use free service that lets you put all your photos, documents, music, and video in a single place so you can access them anywhere and share them everywhere.

www.mediafire.com

Here is the link to the scatter.txt for mt6833 (revvl v+).

MT6833_Android_scatter.txt

Shared with Dropbox

www.dropbox.com

Tmobile just recently announced the release of the a13 update. It's supposed to be before the end of february.

T-Mobile REVVL V+: Update to Android 13

Find out about the Android update on the T-Mobile REVVL V+.

www.t-mobile.com

Message edited at completion of guide. Irrelevant content removed.

 

[vinnie215215]

After installing the modified boot img with fastboot my phone bricked and i cant fix it, it just crashes on boot and loops back whenever i try to normal boot.

If there's any help you can offer I'd appreciate it.

 

[R41N MuTT]

After installing the modified boot img with fastboot my phone bricked and i cant fix it, it just crashes on boot and loops back whenever i try to normal boot.

If there's any help you can offer I'd

Edited: guide complete. Try it now.

 

[vinnie215215]

When your phone boots up do you see system font on the screen? It should prompt you to press power to boot normally, otherwise it will continue to reboot. It's because the bootloader is unlocked and you must press power to acknowledge this or else the phone will boot loop. Does this help? If not, get another phone and download magisk and try to patch boot_a again. You can use another device to do all those steps to get the file ready. Pull it, plug in your revvl v+ again and try flashing it. You can also try a different copy of the firmware, I linked 3. You can also flash stock boot_a and boot_b and that should get you going. I'm still figuring this device out. I advise you reach out to somebody who has a lot of experience flashing a/b partition scheme devices, namely mediatek. Project oppo. My only other suggestion is to flash the stock firmware using adb fastboot commands. In the forums you can find a guide to flashing a/b... So, just to be clear, recite to me exactly what you did up to the point it boot loops. And tell me is there system type on the screen when it boots?

So i Followed the guide exactly and everything seemed to work fine until i flashed the img modified by magisk. Fastboot said it moved and wrote successfully.
Then when i rebooted and hit the power button again to bypass the 'orange' warning instead of starting into a factory reset phone, it flashes the backlight and starts booting again.
Im also unable to get into recovery, fastboot mode is all that works now. I've tried to flash the stock boot_a img but not the boot_b, do you think that would help?
I'm gonna make a new img with my s9 and try that as you suggested.

Edit:
Well i might be handicapped.
I had 2 phones here, the V+ and the 6 pro.
Turns out i did youre walkthrough on the revvl 6 pro. It did unlock it, but obviously when i flashed the boot.img for the V+ it bricked. And i cant find the backup anywhere.

In short thanks for your time, I'm afraid all i did was waste it :\

 

[R41N MuTT]

So i Followed the guide exactly and everything seemed to work fine until i flashed the img modified by magisk. Fastboot said it moved and wrote successfully.
Then when i rebooted and hit the power button again to bypass the 'orange' warning instead of starting into a factory reset phone, it flashes the backlight and starts booting again.
Im also unable to get into recovery, fastboot mode is all that works now. I've tried to flash the stock boot_a img but not the boot_b, do you think that would help?
I'm gonna make a new img with my s9 and try that as you suggested.

Edit:
Well i might be handicapped.
I had 2 phones here, the V+ and the 6 pro.
Turns out i did youre walkthrough on the revvl 6 pro. It did unlock it, but obviously when i flashed the boot.img for the V+ it bricked. And i cant find the backup anywhere.

In short thanks for your time, I'm afraid all i did was waste it :\

Edited to remove irrelevant content. Guide complete. Try it again. If your phone will not hard reboot, try adb reboot bootloader. All activity should cease and your device should promptly enter fastboot.

 

[contevo]

i started messing with this phone on my own until ididn't have right stock firm. is alot steps get this phone rooted.

 

[R41N MuTT]

i started messing with this phone on my own until ididn't have right stock firm. is alot steps get this phone rooted.

I couldn't agree more. Lol. I'm actively editing the content to condense it. I'm also working on porting TWRP. I've done some other things to save a few steps, like patching boot_a and putting it on Dropbox so all you'll have to do is download it and flash it. When a13 OTA gets captured it'll get better

 

[pickymarker]

i get this error when loading the scatter file ad i'm using the latest version
v5.1924

 

[pickymarker]

I couldn't agree more. Lol. I'm actively editing the content to condense it. I'm also working on porting TWRP. I've done some other things to save a few steps, like patching boot_a and putting it on Dropbox so all you'll have to do is download it and flash it. When a13 OTA gets captured it'll get better

can you help

 

[R41N MuTT]

can you help

Currently working on it. I've asked a couple ppl for help. Either they'll post here, or I'll update you. Stand by

 

[pickymarker]

okay

 

[pickymarker]

can it be done today