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  1. iphone4idiots's Avatar
    My friend wants me to upgrade the firmware on his iPhone 3GS which is at 4.0. He doesn't want to lose his unlock however - he's on baseband 05.11

    How high can I take up the firmware, which jailbreak should I use at that point and will it create the GPS problem I've read about.

    Thanks for the knowledge
    I thought my carrier was bad til I got a new web host
    2011-04-08 07:45 PM
  2. Simon's Avatar
    Use pwnage tool or snowbreeze to make a custom firmware and restore to that. That way you can preserve your baseband and still unlock. I would suggest a custom 4.2.1 right now though as ultrasnow has issues on 4.3.1. Do you have 4.2.1 SHSH?
    2011-04-08 07:50 PM
  3. iphone4idiots's Avatar
    I haven't seen his iPhone yet, but am hoping when open Cydia I'll See the 4.2.1 in green

    It's been awhile since used PwnageTool, but all I do is download custom/Apple 4.2.1 firmware. Run PwnageTool and point to that custom firmware. Then plug in iPhone and right click restore and point to ipsw that PwnageTool created correct?

    Also, if I don't see 4.2.1 in green then can't do it cause its too late or would Tiny Umbrella come to rescue?

    Thanks again for the info
    I thought my carrier was bad til I got a new web host
    2011-04-08 09:11 PM
  4. Simon's Avatar
    Ya, you would need 4.2.1 SHSH to restore to a custom 4.2.1. That would be the ideal thing right now. If you must you can still go to a custom 4.3.1 but you will need to install ultrasnow and a ultrasnow fixer from the source
    2011-04-09 02:29 AM