[Q] wp7 surround light sensor(photo sensor) and volume promble???

[kingjing]

First Problem:

My HTC Surround has the promble of light sensor when I call somebody it automatically turns off.

I must sway my hand in front of the screen then after few second it is becoming normal.

Second Problem:

My HTC Surround's volume turns down automatically and I use the earphone which is not the origin.

Please forgive my bad English writting~