Iphone4 32 gb signal problem

[enslin]

I got an iphone4 32 gb factory unlocked 32 gb from France. I have one big problem with the phone, it loses the signal even if im in an area with full signal strength lets say in the middle of the city for like 5 sec and after it gains again full signal, is not a death grip issue i use a case and does not matter in what position i keep the phone. I reseted the os from itunes, reseted network settings etc the problem is still here, i dont know what to do pls help me.I forgot to mention it uses ios 4,1 and durring a call does not lose his signal i tested with my friend a 2hour call in a middle strength area signal coverage not a signal drop only when is on standby or surfing internet. Regards Enslin.

 

[Gregoris]

have you tried it with another sim or in a different area?

 

[enslin]

yes i tried with a diferent micro sim and other network micro sim , and i got same problem.