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Upgrade to OS4 on iPhone 3G help!


Established Member
I upgraded earlier today to OS4, but it has all gone wrong sadly. My phone was previously unlocked and jailbroken, but I am not bothered about that, I was just happy to get OS4. Having done the update via iTunes I get the message "Your SIM is not supported, please insert the original SIM or contact your carrier....." The phone itself will only make emergency calls, everything else is lost....

Everything worked perfectly until I did this. I am on O2 Simplicity. Trying to call O2 today has been rather fruitless:eek:. I have tried to do a restore putting the phone into DFU mode, but to no avail. Every time I do this the same message above reappears. I have no idea at all what to do next, so any and all ideas will be gratefully appreciated......thx:)

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