Restore iphone without updating baseband
Upgrading your i Phone 4 to i OS 4.1 will update its baseband from to 2.10.4 and baseband 2.10.4 is not unlockable at the moment.
Some salient points from the redsn0w blog: I never did any OTA updates, I only ever updated over USB and always uploaded my SHSH blobs.
It's possible that the re-restore is failing due to updating OTA..you get it at 5.1.1, or did it come from the factory like that, because it could be OTA updated there, too.
If you use ultrasn0w or Gevey SIM to unlock your i Phone, here’s the ultimate guide to safely update to i OS 6.1 while preserving your baseband. UPDATE: If you own an AT&T i Phone, unlock it permanently using this.
Today I installed Protect My Privacy, and got stuck in a boot loop.
Holding volume up wouldn't bring me to safe mode.
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‘Hacktivation’ is needed if you don’t have the official SIM card. Once the custom i OS 6.1 is ready you will find it on your desktop.