[General Topics] izyer:
UPDATED 20/10/13 - good news - Original ROM v20.0.0.2 (android 12) with Google Play and all languages.

The bootloader must be unlocked (three small lines "Orange state ..." are visible on the DuoQin boot screen).

You can take 1.0.7 ROM and unlock it Fastboot flashing unlock .

Save dump for recovery in case of something goes wrong.

All you need is FlashTool and drivers for it .

1) Turn off the phone with an unlocked bootloader.

2) In FlashTool, select the Qin F22 Pro Root.txt file in the scatter field .

3) In rows with sections, all checkboxes are enabled.

4) Click Download, then connect the phone to USB.

5) Upon completion, disconnect the phone from the cable, turn it on, get into Recovery . Choose Wipe All and Reset . We are overloading.

6) Turn on the phone and select normal mode (DO NOT SELECT STUDENT MODE)

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Links:

1) ROM f22pro_20_0_2 stock - https://drive.google.com/file/d/1G7y87nBEr8yyM9YvStRfG3Rw5wDPILRk/view

2) ROM V1.0.7 without google play but unlocked: {Mod edit: Link to paid services website removed. Oswald Boelcke, Senior Moderator} (you may need to flash this first with Fastboot flashing before flashing LAST ROM version so you can have an unlocked phone )

3) Mediatek Drivers: https://androiddatahost.com/276a2

4) SPD flash tool: https://spflashtools.com/windows/sp-flash-tool-v5-1924

5) A modified version (by me) of a Pixel Launcher app that works great with this phone , simple and with many features (the only downside is that you cant have "Fast call shortcuts from numeric buttons", they work only with original launcher): https://uploadnow.io/f/gNDS85H

6) Old phone type of keyboard , if you want to write text with your Keypad: https://uploadnow.io/f/BrP5GDP

Other stuff you may want to know about this ROM

1) The mic quality during phone calls seems very bad with noise (only for CALLS , WhatsApp and other apps work just fine) , i am not sure if its because of my Mobile Carrier or not (or its a problem with my device) but it was the same with all the other ROMs ive installed but it was working good with the ROM that the phone came with (came with Google ROM not Original), the last ROM (20_0_2) is not with ROOT so i cant change/test/edit anything to see where does this problem come from. ---- The only workaround ive found is to install "Phone by Google" app from play store (you have to set it as default but after you change the setting you can swap back to original Phone app) and from the Phone app settings under "Accessibility" disable the "Noise Cancellation" function , its still not perfect but way better. (Please post if the call quality is good for you with the stock settings)

Update: It might be a problem with the protective case blocking the noise cancellation mic?? / seems that the Noise Cancellation reactivates after reboot??

2) The phone has working VoLTE with HD Calls but VoWiFi is not working , the setting/option seems to be broken and you cant enable it.

3) There is a similar ROM with ROOT version 20.0.0 but i havent tested it (i think is the NVT version of IT)

4) YOU SHOULD DO A PHONE BACKUP WITH MTKCLINET BEFORE FLASHING ANYTHING!!!!!

5) For Blind People - Yes it has Talkback and its working OK but the default voice volume is low and you can only change it by using an app that allows you to edit system settings , post here and ill try to help you do it.

5) I need more testing on this ROM , ill add here if ill find new bugs etc...

What i did when i bricked my phone trying to flash over locked bootloader and screen did not light up :

So i got into mtkclient and you need to have python installed , check mtkclient website)

Opened Flash Tool and used Format all Flash then disconnected the phone

(somtimes needed to keep OFF button pressed for 10 sec before i can connect again)

cd mtkclient

python mtk wl ROM (this will flash all the files from my backup - unlocked bootloader)

pressed volume UP and volume Down at the same time and connected the USB to the phone, phone started flashing the files

after all done i disconnected the phone from the USB

opened Flash Tool and i pressed Download button with everything selected.

connected the USB to the phone (without pressing anything on the phone)

it flashed and it worked.

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ENJOY!