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

iPhone 4 / iPhone 4S iPhone 4 / 4S

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Old 11-24-2010, 00:47   #1 (permalink)
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How to prepare for iOS 4.2 jailbreak with TinyUmbrella 4:21:01


Don’t use TinyUmbrella to save your baseband. It’s not going to help you out with that.

What it will do, however, is save another critical piece of info as a back-up for you. TinyUmbrella does save the signature, or SHSH Blob, that Apple has for your specific handset. (This is what’s used to verify that your device is eligible for updating to a particular iOS version.) This is very, very useful if you update and then want to downgrade back to a previous version. After a period of time, Apple will stop providing these signatures, making it impossible to downgrade if you have not saved yours before.

How to prepare for iOS 4.2 jailbreak with TinyUmbrella 4:21:01
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