[GUIDE] Xiaomi Qin F21 Pro Custom Firmware, Root, Playstore Certified

[Jbazt_katuforzs]

Does anyone have the stock recovery image? I would like to go back from twrp after this process.

A few of my apps (e.g. message+) are crashing after setting them as system apps using systemizer. Anyone else having this issue?


Can you provide a link to this mitmachim forum? I would like to check it out.

for some strange reasons, this is a bug of systemizer or the firmware if you uninstall the app youve transfered using systemizer. you need to factory reset the phone to remove the force closing app error.

 

[sdmde]

can i have stock boot.img no twrp

 

[sapp001]

deleted

 

[izyer]

I have super.bin image file for Qin F22 Pro from the seller , the phone came with stock android firmware and google play + all languages but the buttons (answer call , end call etc..) werent working right , they were not mapped, everything else was working great but i needed a full working keypad (so the phone can be controlled only from it).

The phone came with unlocked bootloader.
After flashing this version of the ROM (with factory UI and google play ,but only CH and EN languages, no bloatware) seems that WiFI stopped working (no driver error or something) and an app keeps crashing time to time in the background, Youtube doesnt work and i cant remove widgets with stock launcher (i replaced with nova launcher) the rest seems to work just fine (buttons are mapped correctly now).

Flashed with: flashboot flash super super.bin

I would like to know if its possible to modify contents in super.bin and reflash (possibly to add and extra language and fix the WiFI and rest of the problems , mainly the WiFI problem)

Anyone wants to give a shot fixing this firmware (if possible, i can upload it somewhere) ? ( i am stuck with it as i didnt backup the old firmware)

 

[DanielHusney]

Hi first of all thank you so much for this tutorial!

I was just running into an issue when trying to download the flash file onto the phone, this error was coming up.

Did I do something wrong?

 

[Jbazt_katuforzs]

Hi first of all thank you so much for this tutorial!

I was just running into an issue when trying to download the flash file onto the phone, this error was coming up.

Did I do something wrong?

View attachment 5748779

you are not bootloader unlocked

 

[DanielHusney]

you are not bootloader unlocked

What would be the easiest way to unlock the bootloader?

 

[Jbazt_katuforzs]

What would be the easiest way to unlock the bootloader?

https://forum.xda-developers.com/t/tools-mod-scripts-mlgmxyysds-qin-f21-pro-unlock-tool.4368277/

 

[Jbazt_katuforzs]

came acrossed a new posted screenshot of the phone in 4da. for some strange reasons, the screenshots appears to be on data with carrier aggregation (4G+). Its like phone's modem configuration was supported or allowed to connect to 2 (or more) cell tower 4G signals it could pickup to combine the data speeds. I know this custom firmware was made based on the early firmware of the device and Ive tried enabling that carrier aggregation settings in Engineering mode but always failed (kernel locked?). I know there's like 2-3 versions of the firmware came stock from the factory. Can anyone comfirm that this firmware supports 4G+ (carrier aggregation) as well? or yall not getting the 4G+ too? or its just my simcard (new established network service) not capable of aggregation yet. Because if its not, I want to know whats the version of the firmware that does. The phone's specs sheets doesnt listed it supports carrier aggregation (CA) when advertised. perhaps its one of the updates pushes theyve added or theyve unlocked to improve the firmware bcoz the SOC trully supports carrier aggregation.

 

[isach59]

{Mod edit: Quoted post has been deleted. Oswald Boelcke}
Solved with this tool https://forum.xda-developers.com/t/boot-image-unpack-mtk-bootloop.4516331/post-87698597 it doesnt need unpack and repack of the boot.img !!!

 

[Jbazt_katuforzs]

Solved with this tool https://forum.xda-developers.com/t/boot-image-unpack-mtk-bootloop.4516331/post-87698597 it doesnt need unpack and repack of the boot.img !!!

Glad you figured it out. whats the reason for editing the boot?

 

[tilthornet]

Completed this, and my only issue is some bank apps that refuse to start. Error message with rooted/jailbrake warnings. The device passes Safetynet. Any tips for fixing?

 

[Jbazt_katuforzs]

Completed this, and my only issue is some bank apps that refuse to start. Error message with rooted/jailbrake warnings. The device passes Safetynet. Any tips for fixing?

read few pages back. there's a trick how to bypass root check of banking apps

 

[tilthornet]

read few pages back. there's a trick how to bypass root check of banking apps

Yeah. I found out yesterday that I had inadvertently updated Magisk, and lost MagiskHide in the process. So I re-rooted, and was able to add the bank-apps to MagiskHide. Thanks.

 

[YosefM]

Hi, I have a rooted Qin F21 Pro 3/32gb variation. I got a message from the recovery that says all my android data is corrupt, It gives me an option to try booting again or do a factory reset, pressing try again, goes thru the boot animation and than back this recovery screen, what would be the process for backup or read the patitions, so I can get some of my files back before a reset?

 

[Jbazt_katuforzs]

Hi, I have a rooted Qin F21 Pro 3/32gb variation. I got a message from the recovery that says all my android data is corrupt, It gives me an option to try booting again or do a factory reset, pressing try again, goes thru the boot animation and than back this recovery screen, what would be the process for backup or read the patitions, so I can get some of my files back before a reset?

There's no firmware. Try to reflash this rom and flash the boot.img for 3/32 variant found in thread

 

[hoey]

Added Infos!

The true list of supported bands

thanks for the guide and the list of bands. lots of conflicting information online in regards to if this works with AT&T or not. it appears that the list has most, if not all of their bands. hesitant to purchase as I would hate to get it and it not work.

 

[honeydoo]

can I remove the system installed browser?

I removed it on the original version and then it didn`t boot I had to reinstall it via adb

 

[honeydoo]

Here is the link to the 3/32 firmware provided by mitmachim:

2.15 GB file on MEGA

mega.nz

and here is a link to the thread called how to unbrick qin f21 pro:

מדריך | תיקון שיאומי F21 Pro מ'בריק' (לא מגיב) | HardBrick Fix

תיקון לשיאומי | F21Pro | Hard Brick Fix אז התחלתם להתעסק קצת עם תוכנות צריבה וכל זה, והנה לחצתם פה לחצתם שם ופתאום... המכשיר לא מגיב!! אפילו סימן של רוח חיים לא ניראה ממנו... אל תדאגו חברים היום נלמד כיצד לתקן זאת ! טיפ אף פעם אל תסמנו בתוכנת SP Flash...

mitmachim.top

can somebody explain how do flash it using the 3/32 firmware

how do I extract it?

 

[ppczouz]

Hello everyone, and sorry for the long post.

Is anyone suffering from applications being forced closed?
I am on firmware 2.1.6

I have ordered a 4/64 unlocked with GAPPS from AliExpress, and what I received is reasonably de-Chinesed. But it still has the default Qin Launcher and the essential apps provided by Xiaomi (like dialer, contacts, calendar, ...) which is great as they are tailored for this form factor.
There are few issues here and there, but my biggest problem is app closing in the background... a typical Chinese rom issue for non-whitelisted apps... so it is killing Whatsapp and Teams which are vital to me.

The Question: Can I (and should I) downgrade to this rom based on firmware 1.1.1? and if so, what would I lose?

Alternatively, what can be done to prevent the apps from closing? (I assume my bootloader is already unlocked as Google Pay and banking apps refuse to work).

So many thanks to everyone.