Hi, Do you mean that your iPhone is facing jailbreak issue? If so, you can use a powerful iOS repair tool like Joyoshare UltFix. This tool can fix your iPhone with various types of ios issues without data loss.
To fix Game Center issues on iOS 9.2.1, try restarting your device first. If that doesn’t work, sign out of Game Center by going to Settings > Game Center, tapping your Apple ID, and selecting "Sign Out." After that, sign back in. If problems persist, consider updating your iOS to the latest version, as updates often fix bugs and improve functionality.
I bought it on the official website yesterday. It solved my problem very well. Also, I noticed that there is a product called TunesKit iOS System Recovery that can fix ios issues. I plan to try that too.
You can fix up loading Icom problem in IOS 7.1 by resseting your phone to an earlier state.
To downgrade iOS 10 to iOS 9, you could use related professional tools such as TunesKit iOS System Recovery, which supports downgrading any iOS versions. Besides, if you have any other ioS issues, this mighty software can help you to get out of trouble.
The iOS 4.3.5 update was a security fix.
How to fix e 71-1
Actually, it is possible to go back iOS version from 7 to 6. but it will need professional tools. Here I will recommend you the TunesKit iOS System Recovery, which not only deals with various iOS issues, but also supports downgrading iOS versions.
Hi, Apart from the above-mentioned methods, you can also use an iOS system repair tool like Joyoshare UltFix to replace iTunes. This tool will not cause any data loss and can fix all ios-related issues.
It's a type of firmware (like a software) with version of 4.2.1, including multitasking back-grounding in iOS 4 with extra bug fix
You mean DFU mode? It is a feature that can fix iDevice bugs or glitches when you face issues. But sometimes, if you face the iDevice stuck in DFU mode, you can use iTunes to fix the stuck issue or use an iOS repair tool like UltFix, TunesKit, Tenoshare....
extra info: ios 8.1 and jailbroken using pangu8_v1.2.1