Play protect certification

[freako]

Hi guys, I have Sweet from AE with Miui Global 12.5.6. The phone receives every update via OTA. The problem is that gplay says the phone is not play protect certified. I have a friend that bought the same phone from a local store and his phone is certified. I have looked at the google document with the certified phones and RN 10 pro is in it. Any suggestions? The phone is unlocked and I have tried to instal the EU rom several times months ago with the TWRP in beta version but without a luck.

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[ciubex]

I'm not sure if is the same case for you as for mine.
I guess for the moment that Google have developed a way to figure out that the phone have the bootloader unlocked and as a consequence the "play protect" is no longer certified.
Most probably your friend have his phone bootloader locked.
At least that's I encounter with my Mi 10 for couples of days. If I flash back a stock firmware (ROM) but if I let the phone bootloader unlocked it the play protect appear as not certified, but once the bootloader is locked back, then the device appear as play protected certified.

 

[freako]

I'm not sure if is the same case for you as for mine.
I guess for the moment that Google have developed a way to figure out that the phone have the bootloader unlocked and as a consequence the "play protect" is no longer certified.
Most probably your friend have his phone bootloader locked.
At least that's I encounter with my Mi 10 for couples of days. If I flash back a stock firmware (ROM) but if I let the phone bootloader unlocked it the play protect appear as not certified, but once the bootloader is locked back, then the device appear as play protected certified.

How can I lock it back? Just for the test. And then how to unlock it again?

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[ciubex]

To be honest I don't know how to answer to your questions, not because the steps are hard, but the consequences are bad if something wrong happens, actually not so bad, but in case of failure you could reach to a soft brick, depends by the phone.

In conclusion, to answer to your questions:

1. To lock you bootloader you have to connect your phone in fastboot mode to a PC and can run into a terminal (command window) command:
fastboot oem lock
Obviously you have to have fastboot drivers installed.
This command will reset your phone data, so you have to reinstall and reconfigure your applications.

2. To unlock back your bootloader you have to follow same steps which you already completed to have it now unlocked. This time you will no longer have to wait for couples of days or hours to have your phone bootloader unlocked.
Also this operation will delete any of your installed and configurated applications.
The unlock operation should be made with the official unlock tool: https://en.miui.com/unlock/download_en.html

 

[freako]

Ok. If there is no easy way like a button in some MIUI tool.
By the way - I see that TWRP is not beta anymore. I could try to install the eu rom. I have the original fastboot rom in case of softbrick. Is there a fastboot xiaomi.eu rom?

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[ciubex]

1. As I mentioned the easiest way to lock your bootloader is to copy/paste my above command. I suppose that you already have downloaded and installed platform-tools (adb + fastboot) since you already tried before to install the xiaomi.eu firmware.

2. xiaomi.eu custom rom can be flashed trough recovery only (TWRP is a recovery tool). There is no fastboot version.
From fastboot you have to boot or eventually if your model have a stable twrp version, you can flash it to have it permanently on your phone.
So, boot in twrp and install the custom rom from it.

3. You can try a free tool which can help you with flashing, unlocking, and other things.
Once installed, in the application folder is a subfolder which contain adb and fastboot executables. (res\tools\) You can open in that folder a command window (command prompt/terminal) and run locking commad:

fastboot oem lock