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04-28-2014, 08:39 AM #1Upgrade from iOS 6.1.3 to iOS 7.0.3
I have a Sprint iPhone 4s on iOS 6.1.3, I just got a rSim 9pro in order to upgrade & unlock my phone, but have been tested only on 7.0.x, I download the ipsw 7.0.3. But every time I tried to restore my phone with iTunes I get severals errors. I did my research before post this thread and the problem is something about apple signatures.
I don't know if there any other way to upgrade my phone to a non 7.1.x version.
04-28-2014, 09:49 AM #2