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Discuss Cannot exit recovery BB 05.15, FW 4.2.1 iPhone 3G - HELP! at the Ultrasn0w (3G(S)/iPhone 4 unlock) - Hackint0sh.org; i tried...mine is 4.2.1 and i tried the custom fw, i tried the 4.2.1 and ...
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    i tried...mine is 4.2.1 and i tried the custom fw, i tried the 4.2.1 and 4.1 too. but didn't work. do you know why? thanks

    Quote Originally Posted by thematrixz View Post
    So I followed this direction (from Dev blog) to downgrade to 4.1 and everything works now:

    . put iPhone on DFU mode (if you're reading this post, chances are, you're already in DFU mode)
    2. open iTunes
    3. you will recieve message, that your iphone is in recovery mode
    4. shift + restore, pick 4.1 fw (search for 4.1 firmware download, then download it first)
    5. wait for restore, then will be error 1015
    6. your iPhone will in Recovery Mode, download Tinyumbrella (The Firmware Umbrella - TinyUmbrella) and kick out from recovery mode.
    7. jailbreak ultrasnow and 4.1 .

    Good luck. Thanks for numerous users on Dev who shared this method.


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    Quote Originally Posted by thematrixz View Post
    So I followed this direction (from Dev blog) to downgrade to 4.1 and everything works now:

    . put iPhone on DFU mode (if you're reading this post, chances are, you're already in DFU mode)
    2. open iTunes
    3. you will recieve message, that your iphone is in recovery mode
    4. shift + restore, pick 4.1 fw (search for 4.1 firmware download, then download it first)
    5. wait for restore, then will be error 1015
    6. your iPhone will in Recovery Mode, download Tinyumbrella (The Firmware Umbrella - TinyUmbrella) and kick out from recovery mode.
    7. jailbreak ultrasnow and 4.1 .

    Good luck. Thanks for numerous users on Dev who shared this method.
    This worked for me, I upgraded to 4.2.1 then successfully downgraded to 4.1 with baseband 6.15 preserved. I now cannot unlock! Upgraded cydia, installed ultrasn0w 1.2 but still 'no sim'. tried playing with airplane mode, 3G, everything I can think of! still no unlock, anyhelp would be greatly appreciated!

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    Super Moderator Array Olethros's Avatar

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    Quote Originally Posted by A70_Tmac View Post
    This worked for me, I upgraded to 4.2.1 then successfully downgraded to 4.1 with baseband 6.15 preserved. I now cannot unlock! Upgraded cydia, installed ultrasn0w 1.2 but still 'no sim'. tried playing with airplane mode, 3G, everything I can think of! still no unlock, anyhelp would be greatly appreciated!
    Were you able to unlock prior to your baseband being updated (not to 6.15 but before you updated baseband to 5.14 or 5.15)

    Ultrasn0w cannot unlock IMEI blacklisted phones or phone with hardware problems.

    Also, if you are on T-mobile US (or another carrier that uses a non standard 3G frequency, turn off 3G and try again)
    Please read the stickies & search forum before posting!
    How to report an iTunes restore/update fail in a useful manner
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    iPad 3G 64GB (4.3.3, Redsn0w) oldest SHSH 3.2.2
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    iPhone 3GS 32GB (4.3.3; Pwnagetool) factory unlocked oldest SHSH 3.1
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