Unsure which version of iOS your iPhone can run? Here’s a quick guide so you can find out if your iPhone is compatible with the most recent iterations of the iPhone operating system, and, if it isn’t, ...

If you updated to iOS 7 from iOS 6, and are now suffering from motion sickness or acute day-glowitis, I have bad news: You can no longer downgrade from iOS 7 to iOS 6. You're stuck. This is partly for ...

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