Problem with my 3gs
 

Hai all members of GSM-Forum i need some help for u i have one 3gs with ios 4.0 but i have one problem when i am connected in internet can't reicive any call's can u help me how what i need to do to fix this probleM ?
can i do update in ios4.01 or any later version maybe can fix this problem or not ?

thnxx for help...