iPhone 3GS 4.1 no out going calls

[mdmosheur]

Hi all firends

i have a griet problem

incomeing call ok

but not out going calls



please help me ..............

 

[safeer741101]

formate the handsett

 

[mdmosheur]

formate the handsett

how to formate iphone 3gs 4.1 ?