EDIT: This guide is outdated now that 5.1.1 is out….go to the newer guide HERE
If you updated your iPhone 3GS which was previously unlocked to iOS5.1 you probably noticed that it wont pick up signal anymore and it just says “searching…” and eventually “No Service” even if there is no sim card in the iPhone itself. Follow the steps in the video below to get your iPhone up and running in no time.
Redsn0w 0.9.10b6 (Mac):
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