Hello, I just bought a new Redmi 3 pro and I immediately have 3 problems. 1) every time I unlock the screen or hit the "home" button I get a "Just a sec..." notification and I have to wait for 1-2 seconds... 2) I can't set any third party launcher as default. I select it, but when I go "home" again it's still the original one and when I go to the the "defaults" settings, the selected default launcher is again the "System launcher". The new launcher is allowed to start automatically in the security folder and I rebooted the phone after every step of the procedure, but it didn't help. 3)All the warnings and messages I get (for example about the volume) come in a window with an extremely dark grey background and you can barely read the text. My phone is running the MIUI 7.9|Stable 18.104.22.168 (LHOCNCL) version. Thank you very much for your help!!