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Is it possible to downgrade and unlock an iphone

I have an iphone 3gs which I got last summer. It froze yesterday and I followed instructions to restart in itunes. Ended up restoring to latest firmware. I'm in the UK using T mobile. Is it possible to downgrade and unlock to a previous firmware with latest firmware 3.1.2? and unlock to a previous bandwidth?

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  • Anonymous Mar 19, 2014

    i need to downgrade 4.1.2 to 4.1.1 to unlock my att s3...cand find 4.1.1 need help to find firmware



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  • 57 Answers

As arule you cant downgrade only upgrade on i-phones.

Posted on May 06, 2010


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How to unlock iPhone 3gs 32 gb BB 05.16.08 without upgrading or downgrading baseband

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I have iphone 3gs , booltloader 06.04, baseband .05.14.02, OS 4.01... i accidentally upgrade its version to 4.1 after that i did downgarde to 4.01 using tinyumbrella n hactivate, jailbresk it using...

You can certainly jailbreak, but you cannot unlock as of yet. It doesn;t matter if you downgrade the 4.1 firmware, that may help you jailbreak but it is the Modem Firmware or Baseband that matters. Your baseband upgrade camme with the 4.1 update. Since you are at 05.14.02, you cannot unlock as of now, period. You cannot downgrade the baseband on a 3GS, so jailbreak using Limera1n or Greenp0ison, but you need to wait for a new version of Ultrasn0w in order to unlock for anything other than AT&T.

Dont worry though, my sources tell me that the unlock is on it's way to be released.

Good luck, contact me anytime.

EJ Kudelka

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Re-download the ipsw file that was on your iPhone, Download Spirit to jailbreak, and that should do the trick.

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i seem to have the same exact problem, i dont thnk it is unlockable at this stage, a new unlock called thunderst0rm is released on april 23rd, not sure if its real people seem to thnk its a fake for no real reason, also some1 called musclenerd seems to have cme up with a solution but isnt sharing it just yet. i have no idea why not are anything, i thnk we will have to sit and wait

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