Hello, I'm new to this forum and I just bought a Mi3 WCDMA 16 GB. Today I updated it from recovery mode to 4.12.12 but now the phone seems to have bugs and stuff like that. My question is: how can I reinstall 4.12.12 working correctly? Do I need to full wipe mi phone? I read the guide and it suggests to use "Rom Manager". Is it still the best way to do it or I can also do it with Mi recovery mode?