c5000 biggest problem HELP !

[LOLLA]

HI
ALL MEMBERS I HAVE A PROBLEM, MY C5000 TURNS OFF WITH SIM,I HAVE FORMATTED THE MOBILE 3 TIMES BUT NOT HELPED.....PLEASE POST YOUR COMMENTS FOR ME URGENTLY.:confused:

[teknospc]

Open the phone and clean the Sim socket area ( Do not use alcohol ), re-heat some carefully and try again!

[yashtel]

iy is not an unusual problem, decrease the load from the phone initially open the speaker , camera if possible check it will be ok.

after decreasing the load if it is solved, battery problem

[LOLLA]

I have already checked 3 batteries on it...but i think (brother is right there is some problem in sim socket.)