Basically, I have received an Iphone 5 purchased from ebay (cash converters ebay) and I have done a sim swap from my giffgaff micro simcard to a NANO sim for the new iphone 5. I did the sim swap at around 1pm and I still haven't got any signal. Anyway My 3g is working but I dont have any signal bars at all and I can send Imessages but like I said no signal at all. I have contacted GiffGaff about the 3g working but no signal but they said wait 24 hours tops. I dont mind waiting but wont the sim swap have finished with the 3g working or will it still be performing the swap? Also now I beginging to panich thinking the phone maybe blocked but I have asked a few people and said if the phones IMEI number was blocked the phone wouldn't even work with 3g so now I am stuck now. Can anyone help please or had any simular problems? Should I try cleaning the sim card ?