Question For those who have flashed International ROM but NFC not working

[a723356]

PS: I know some of the linux thing, but I have no experience in building an Android ROM. Any suggestion and discussion are welcomed

1. Make sure you are on the CN ROM. If not, revert to it.

2. On your CN ROM with magisk/root access, run

dd if=/dev/block/mapper/vendor_a of=/sdcard/vendor.img

this is to dump the vendor partition where the NFC drivers locate. use vendor_b instead if you are in the b_slot

3. Copy your dumped vendor.img from your phone to your computer with fastboot env.

4. Now flash your internation ROM: AP only

5. run

fastboot reboot fastboot

get your phone into fastbootd

6.

fastboot erase vendor_a
fastboot flash vendor_a <path of your vendor.img dumped from CN ROM>

7. reboot to fastboot, run fastboot erase userdata in case the userdata is encrypted

8. restart your phone

 

[lintongdadev]

Ehh it works, thanks brother!

 

[StuDentBR]

PS: I know some of the linux thing, but I have no experience in building an Android ROM. Any suggestion and discussion are welcomed

1. Make sure you are on the CN ROM. If not, revert to it.

2. On your CN ROM with magisk/root access, run

dd if=/dev/block/mapper/vendor_a of=/sdcard/vendor.img

this is to dump the vendor partition where the NFC drivers locate. use vendor_b instead if you are in the b_slot

3. Copy your dumped vendor.img from your phone to your computer with fastboot env.

4. Now flash your internation ROM: AP only

5. run

fastboot reboot fastboot

get your phone into fastbootd

6.

fastboot erase vendor_a
fastboot flash vendor_a <path of your vendor.img dumped from CN ROM>

7. reboot to fastboot, run fastboot erase userdata in case the userdata is encrypted

8. restart your phone

What Rom are you using?
Do you have any bugs on it?
Android auto works?

 

[StuDentBR]

PS: I know some of the linux thing, but I have no experience in building an Android ROM. Any suggestion and discussion are welcomed

1. Make sure you are on the CN ROM. If not, revert to it.

2. On your CN ROM with magisk/root access, run

dd if=/dev/block/mapper/vendor_a of=/sdcard/vendor.img

this is to dump the vendor partition where the NFC drivers locate. use vendor_b instead if you are in the b_slot

3. Copy your dumped vendor.img from your phone to your computer with fastboot env.

4. Now flash your internation ROM: AP only

5. run

fastboot reboot fastboot

get your phone into fastbootd

6.

fastboot erase vendor_a
fastboot flash vendor_a <path of your vendor.img dumped from CN ROM>

7. reboot to fastboot, run fastboot erase userdata in case the userdata is encrypted

8. restart your phone

Is it possible to use this method to change touchscreen drivers? Do you know where it is stored at?
I was having a weird touch screen problem with virtual buttons with an international modified Rom and this touchscreen problem was not present on Chinese stock Rom...

 

[zlebors]

PS: I know some of the linux thing, but I have no experience in building an Android ROM. Any suggestion and discussion are welcomed

1. Make sure you are on the CN ROM. If not, revert to it.

2. On your CN ROM with magisk/root access, run

dd if=/dev/block/mapper/vendor_a of=/sdcard/vendor.img

this is to dump the vendor partition where the NFC drivers locate. use vendor_b instead if you are in the b_slot

3. Copy your dumped vendor.img from your phone to your computer with fastboot env.

4. Now flash your internation ROM: AP only

5. run

fastboot reboot fastboot

get your phone into fastbootd

6.

fastboot erase vendor_a
fastboot flash vendor_a <path of your vendor.img dumped from CN ROM>

7. reboot to fastboot, run fastboot erase userdata in case the userdata is encrypted

8. restart your phone

what img files are excluded in AP flashing process?

 

[zlebors]

doesnt worked for me

 

[SnegovikRZN]

How big should the file be "vendor.img"? My has 1,13GB
I try flash it, but get error.

C:\Users\snego\Downloads\tools_r33.0.2-windows>fastboot erase vendor_a
Erasing 'vendor_a'                                 (bootloader) Permission denied
FAILED (remote: '')
fastboot: error: Command failed


C:\Users\snego\Downloads\tools_r33.0.2-windows>fastboot flash vendor_a vendor.img
Invalid sparse file format at header magic
Resizing 'vendor_a'                                FAILED (remote: '')
fastboot: error: Command failed

1. Go in fastboot mode
2. fastboot reboot fastboot
3. flash vendor in fastbootD mode.

but still it didn't help. phone won't boot after vendor.img flash