![]() Support flashing iPhone 8 and iPhone 8 Plus.įix a bug that iPhone 6s and 6s Plus fail to downgrade back to iOS 10.3.3 from iOS 11.ġ. And finally, we released a new version of 3uTools, V2.16 to fix this.įix the error unable to request SHSH while restoring. ![]() As a result, users can not restore their iDevices using iTunes or earlier versions of 3uTools.ģu Team try our best to solve this issue as soon as possible. ![]() After we tested and researched, our developer team find out that this issue may be caused by Apple server. And on iTunes, it is an unknown error (3503). On 3uTools, the error is “Unable to request SHSH”. In fact, Apple isn’t made a full explanation of iTunes error code 3503 yet. Recently, many iOS users complained that there is an annoying unknown error 3503 in iTunes, which stop them from restoring and updating. ![]()
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December 2022
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