Ive just bought a Nokia 6600 of ebay. Its locked with 02 but when I insert my sim card the error "SIM Card registration failed" appears and doesnt gain a reception. But this doesnt happen all the time, sometimes it works and sometimes it doesnt!
Yeh I've emailed the person I bought it off and they were saying it was working fine before he sent it out. Ive tried formatting it as well. Its strange because it reads in the phone numbers I have on my sim card at the moment but I just cant get a reception