Help Problems after gingerbread update

[tapaturma]

Hi

after gingerbread update my phone began to have these weird symptoms. Does anyone know cure for these or does anyone else have these same problems?

1. randomly proximity sensor does not work on calls and it is very frustrating because the screen is turned on and my cheeck presses buttons

2. calls started to have these weird laggy sound on them like one would have very bad sound card drivers or there is not enough cpu power to process the sound.

3. back and menu oled buttons stop working sometimes, after a reboot they work fine.

i have done a factory reset and it did not help

 

[cerberusss]

I have seen the same behaviour because I didn't use the official charger.

Otherwise, back to the store.

 

[joaoesquecido]

I also have your #3 problem (Back and Menu keys randomly stop working). I found that if I lock and then unlock the screen, they start working again.