Sir, i successfull restored my iphone 3gs( ios ) from 4.1 to 6.1.3 by itunes, now its asking for activation. when im going for activation its saying that no sim card is inserted but i have vodafone sim inside my phone... but it not covering signal. so im using my wifi to activate my iphone but its not activating... then i used itunes to activate by it's again saying that no sim card detected ... HELP ME PLEASE... im stuck here..... i restored my iphone after resolution of many errors...like 16xx, 30xx, 10xx and many more now i have done that much just activation is remaining so please help me .... you are my last option please