My phone 5 was stuck on searching .. Apple store said antenna and sim reader were broken ?? despite the phone not being dropped or used much. I tried network reset .. no good i tried software update and it wouldnt do it thru itunes even.. gave the 4005 error message. I resorted to a factory reset , even this crashed continually in itunes , after hours of retrying it eventually worked and the phone is working fine . Apple are a disgrace and wanted £200 to replace the phone as it was 3 months out of warranty .. hope this helps someone .
I had the same problem , 2 Apple stores said the Antenna was broken , and wanted £200 to replace as it was a few months out of warranty. I tried resetting network etc etc .. Then tried an update which came up with a 4005 error message , Apple are pathethic , the software updates are rubbish. I then did a full restore to factory settings .. which crashed , then crashed again even through itunes which i was using . Then 3rd time lucky it worked and the sgnal was back.. phone now working . So Apple store advice of the phone being needing replaced couls have cost me £200 .. disgraceful service .