Hello guys. My problem started few days ago, I can't use my 3G service at all any time I try using the Internet message pops up that 'couldn't activate cellular data network' My iPhone 4 is factory unlocked, am using a customized ipsw by snowbreez 4.3.3, and in the past I downgraded from 4.3.5 to this version. I tried everything, soft reset hard reset backup and even restore (but to the same customized ipsw 4.3.3) and nothing worked! The only thing lift is to update to 4.3.5 What's the deal of my iPhone?! What happened?! I never had this problem before please help... NOW.... am giving up!!! i upgraded to 4.3.5 and still i have the same problem here should i go fix it or what?! is it a hardware problem!!?