Hi all, I purchased a used iPhone 3G. Before buying, I tried my sim card on it and it worked. But now it does not work at all! It searches and then says no service. I have tried everything! Spent countless hours trying, no luck. Specs: iPhone 3G 16GB BB: 6.15 Running: 4.1 Bootloader: 6.02 He had it jailbroken and unlocked before. I believe it is originally a Fido iPhone (put in Fido sim to activate) I use redsn0w. At first, it was only my Fido sim card that did not work, my friends Fido sim had worked. I decided to restore it and re-jailbreak and unlock. After having does this, no sim cards work at all. All say "no service". I have searched and read almost all post and researched many times to find a fix but no luck. I have very close to throwing this POS against a bricknwall... I have tried almost everything! Such as: - Restoring - Restoring and jailbreaking and unlocking - Turning on and off - Turning 3G on and off and rebooting - Playing around with flight mode - Almost every other method... Could it be a hardware or antenna problem? Thank you all for reading.