Recently I've bought myself an iPhone, already Unlocked (factory unlocked or how do you say it). 1 week after purchase suddenly this message came out "Repair needed. iPhone cannot make or receive calls. Contact Apple at www.apple.com/service." And "No service" on the left corner. Now I'm using iPhone OS 3.0, when I used 2.2.1 with 2.30.03 same thing happened. If I restore it same thing happends again after some time. I already called from it and everything was alright.

Help appriciated.