xiaomi mi mix 3

My Xiaomi Mi Mix 3 doesn't' turn on, I have the phone since 2019 and never has a problem. But now the phone doesn't do anything, no led light no vibration, no nothing. I press the volume + power but nothing. I change the battery recently but that doesn't change anything. Somebody know how can I...

Hi, I have been trying to unlock my mi mix 3 to change the global ROM to the European ROM. However, I can't associate my Mi account with the unlock in developer options. It always gives error. Can you please help me find a way to overcome this obstacle?

Does *no-support-for-this-app-on-this-forum* work? I can't test it because I still have to wait 22 hours to unlock the bootloader. But I had some problems with China Stable ROM and *no-support-for-this-app-on-this-forum*, because the *no-support-for-this-app-on-this-forum* was very laggy. I had to install China Dev ROM in order to fix that. So has anyone tested *no-support-for-this-app-on-this-forum* on EU Rom yet? Thanks in advance...