Nokia3110c
Automatically switching off, when calling &using net

I have very a serious problem in my nokia 3110c. My mobile is switching off automaticaly… i went to customer care several times ..about 11 times … but they are not able to solve my problem …. so i want to change my nokia 3110c ………

address

mig-a-74, shastri puram.

sikandra.

agra

mob.9548357652, 9808389849