my nokia n85 phone is getting switched off when ever i try to call some 1

[sridharan_9999]

or recieve a call. please solve it.? my nokia n85 phone is getting switched off when ever i try to call some 1 or recieve a call. please solve it. iwould be glad to know if any 1 can solve it. itried a lot re-installed firmware, formatted mmc and a lot.