N73m
PROBLEM IN CELL

I HAVE NOTICED THAT SINCE LAST FEW WEEKS MY CELL N93M IS NOT RESPONDING AS EARLIER IT IS BEING HANG UP DURING SOME WORK WHEN EVER i HAVE FIND A NAME OR READ A MESSAGE IT TAKES A LONG TIME ALSO I HAVE NOTICED THESE DAYS THAT WHEN EVER ANY ONE CALLS ME UP NO SOUND COMES OF RINGING...