iPhone 3G keeps losing signal/service

"sorry to answer that late (ok, it's 05:42am ;-)) - i think it's a connection problem - so, yes - open it again and check all the connections, search for broken parts in the area around the ""do not remove"" sticker

CLICK for a HUGEer version of the picture

CLICK for a HUGEer version of the picture

check both sides - the circuits around the golden spring are for the antenna - so if there is a problem - it might lead to those problems. surely - the antenny could also have a problem, but it's not an antenna in the regular way - normally - it fails because of a bad connection"

"make sure the sim tray is flush with the top of the phone and that the aim card isn't bent

Update

sorry sim card isn't bent, I had this problem with a 3G it kept droping 3G signal then turning off then saying connect to I tunes then no service. I took out the sim card and the tray blew down the hole in the phone put sim back in and it has sorted my problem hope this helps.."

you can get the 3G or 3Gs and 4G antenna signal coil here

hi my iphone 3g show no service ...WHY PLEASE HELP ME

i have a quastion i have an iphone 3 but is giving me a hardtime with the signal always is going out of network and i dont know why i already checked the antenna and everything i d

I don't have a iphone but have you tried disabling one of the bands and make it 3g only or 1x only?