Touch pro phone problem

[wwgjia]

hi, i dont know if anybody has found that the touch pro phone often does not work properly. My problem mainly shows silence (could be either end) when a call is connected or no rings on the other end when dialed. it has nothing to do with the position sensor as even disable that function, it behavious the same. have been tried different roms, does not help. i hope i am not repeating the similar thread as i did not find it in FAQs. thanks a lot in advance for your attention.