How to Downgrade Your iPhone 3GS, 3G Baseband for Unlock (Windows)

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Comments (283)
Biswajit Tripathy - August 16, 2014 at 10:14am
Whatever I do I am unable to downgrade the baseband for my iPhone 3GS running iOS 5.1.1 from 6.15.00. Have tried all steps on all forums. Its been 4 days I have been trying continuously....
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Doc132 - August 2, 2014 at 8:32pm
for ios 6.1.6 you must use the ios 6.0 ipsw to get redsnow to read the ipsw. this worked for me hope it works for someone else !!
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yunusemre - June 27, 2014 at 11:11am
me too gjg erroe
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gjg - June 28, 2014 at 2:20am
i did a full restore
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gjg - June 26, 2014 at 3:29am
Help pls... Error! Please reboot the device into normal operating mode, then perform a clean "slide to power off-
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gjg - June 26, 2014 at 2:49am
what ipsw to use when i'm on ios 6.1.6 now?
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gjg - June 26, 2014 at 2:41am
what ipsw to use when i'm on ios 6.1.6 now?
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Arpith - April 10, 2014 at 7:33am
My ophone struck on Rebooting...
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Zia - April 6, 2014 at 3:44am
Redsn0w is not supporting "iPhone2,1_5.1.1_9B206_Restore". It says this version of Redsn0w doesn't support this. have iphone 3gs iOS 6.1.6 which i recently jailbreak but after the jailbreak it shows "no service" and in ICCID shows No SIM..Please help.. should i download some other version of firmware.?
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Office Offline - April 6, 2014 at 6:12am
Just Install Ultrasn0w from cydia for your unlocking problems
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jesan - February 25, 2014 at 9:31pm
i have to fix the no wifi problem while unlocking iphone 3gs
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Arena - February 14, 2014 at 2:22am
For people having trouble unlocking their AT&T devices, you can check out attiphoneunlocking, they can unlock all AT&T device up to date
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