Problem How to upload iOS 6.3.1 to iOS 7.1.2

Tutorials about 3uTools and iOS. A place for you to learn more about iOS.

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komshi82
Posts: 5
Joined: 02 Dec 2017 20:38
like: 0

Problem How to upload iOS 6.3.1 to iOS 7.1.2

Postby komshi82 » 02 Dec 2017 23:31

I need help!
I have a problem, I did a downgrade to iOS 7.1.2 on iOS 6.1.3 and after that the phone does not recognize the SIM card, writes <NO SERVICE> that this has to do with what is the 4G card?
When iTunes tried to boot up the system on iOS 7.1.2, it made me blame and, of course, as every blind person did not do a back up on my computer, I guess this problem happens because the phone is a jailbreak.
How do I do an unjailbreak, or in any way to raise iOS to 7.1.2?

thanks in advance!

Grace Liu
Posts: 451
Joined: 20 Oct 2016 09:33
like: 57

Re: Problem How to upload iOS 6.3.1 to iOS 7.1.2

Postby Grace Liu » 04 Dec 2017 09:46

Hello, if you downgrade iPhone 4 to iOS 6.1.3, your device would have no service.
After your restore to iOS 7.1.2 on 3uTools, your device is not jailbroken.


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