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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone 4 / 4S

iPhone 4 / 4S iPhone 4 / 4S

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Old 09-20-2012, 16:08   #1 (permalink)
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4s downgrade 6.0 to 5.1.1

yesterday i upgrade 6.0 and modem 3.0.04
right now downgrade 6.0 to 5.1.1 orginal firmware
dfu mode via itune 10.6.1.7
and first time i saw downgrade modem 3.0.04 to 2.0.12
possible still signature for 5.1.1
now you can downgrade at this moment possible until apple
stop signature for 5.1.1

hurry up
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Old 09-20-2012, 17:09   #2 (permalink)
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if that possible then baseband downgrade also possible for iphone 4
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Old 09-20-2012, 17:14   #3 (permalink)
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normally baseband cant downgrade and i did not test on 4g
only possible if iso signature valid and right now valid for 5.1.1
maybe today or tomorrow stop signature than you cant downgrade bro
you can try now best of luck
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Old 09-20-2012, 18:02   #4 (permalink)
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i just upgrade my 4g to 6.0 it comes with bb 04.12.02 then i downgrade to ios 5.1.1 and its downgrade to BB 04.12.01
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Old 09-20-2012, 18:08   #5 (permalink)
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so right now it work all i devices
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Old 09-20-2012, 23:52   #6 (permalink)
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HERE IS PROOF IPHONE 4G 6.0 TO 5.1.1
MODEM 04.12.02 TO 04.12.01

i devices downgrade 6.0 to 5.1.1 including modem - YouTube
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Old 09-21-2012, 09:15   #7 (permalink)
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downgrade 4s 6.0 to 5.1.1 wow modem 3.0.04 to 2.0.12 it work thx sultansaga
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Old 09-21-2012, 11:43   #8 (permalink)
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Can only downgrade for a few more days until Apple keeps on signing.

You can always check by first trying to save shsh on tinyumbrella.

Baseband will be downgraded for 5.1.1 only. Doesnt go lower than that.
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Old 09-21-2012, 12:01   #9 (permalink)
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Yes you are right . Important for 4s user
Who use gevey sim for unlock beacause at this time modem 3.0.04 not supported with gevey
And you can downgrade To 2.0.12
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Old 09-21-2012, 17:36   #10 (permalink)
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I just successfully downgraded 1 iphone 4s from 6.0 to 5.1.1 2.0.12 firmware..
Luckily signing window is still open so I could unlock the phone through Gevey Ultra S chip again
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Old 09-21-2012, 17:42   #11 (permalink)
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it not ganna last for long time today i have done 4 and 4s from 6 to 5.1.1
last chance to save your shsh before apple close signature for 5.1.1
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Old 09-22-2012, 17:10   #12 (permalink)
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Exclamation 4S downgrade not possible anymore ?

4S downgrade from 6.0 to 5.1.1. not possible anymore ? checked twice and got Error 3194

thanks
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