w600I Faults- Replaced phone twice already

This doesnt happen everytime but i would say 50% of the time. When i sping the phone to open it up, the power shuts down completely.

Sometimes when it is sitting there, The phone will just power off by itself then sometimes power back on when i press a button or comepltely stay off.

Also, my reception has started to suck! Crackling noises.

ALso, I am having alot fo trouble getting my blue tooth headset to work with it. Like i need to add the New Device. I followed the instruction but something is not right.