so its cus if i make during calls i dont hear any ring or any sound but on viber if i call someone with viber or tango it works i dont know waht works the problem !! now the only thing is ( if i now update my iphone then my sim card carrier did not anymore is cus of i really dont now either ( my iphone4 sim card carrier works only on version 4.3.3 my iphone is now on version 4.3.3 so if i now restore it to the new version ill not have any sim card carrier !!!!! so pls pls pls if u guys have any ideas pls let me know .... thank so much