I have a 3g iPhone. I had already successfully unlocked a 2g, so I felt pretty confident moving forward unlocking the 3g.
Which was running 4.2.
Which meant doing the whole ipad-baseband thing.
Fine. Everything SEEMED to work (jailbroken too). Except it doesn’t read the sim. Sim works, I tested it in the 2g. But two different working sims are seen by the iphone but it registers as “no service”. Any ideas before I sell this thing as an iPod touch on ebay?
Try connecting it to itunes and try a restore to factory. Failing that, hold down the power and the D pad until you can see the usb cable on the screen and put it into DFU mode, then restore.
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Declan