IPhone 3G won't boot up! Please HELP!

Discussion in 'iPhone Tips, Help and Troubleshooting' started by mib2022, May 15, 2009.

  1. mib2022 macrumors newbie

    Joined:
    May 15, 2009
    #1
    Hello,

    I have an IPhone 3G, 2.2, baseband 2.28. I used Quickpwn to jail break and then used yellowsn0w to unlock through cydia. It worked fine for a few days, then for some reason it began to display and error saying "invalid sim" when any sim card is in it even an ATT sim card. A litte while after that it just simply wont boot up, it displays the apple logo statically and doesn't boot up.
    Please let me know if there is anything i could do. Also, I tried a hard reset to no avail it just turns off. I also tried connecting it to itunes and it doesnt seem to be detected by itunes. This is a nightmare, please help if u can!
     
  2. jmann macrumors 604

    jmann

    Joined:
    Dec 8, 2007
    Location:
    bump on a log in a hole in the bottom of the sea
    #2
    Put the phone into DFU Mode, and then do a custom restore to 2.2.1. :)
     

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