Reinstall iOS on iphone 4

I have an iphone 4 which I've been told has a corruption in IOS7. I've backed the phone up and need to reinstall IO7. How do I go about doing that?

Do a normal restore to factory settings like this:
http://support.apple.com/kb/ht1414
Or restore to factory settings in recovery mode like this:
http://support.apple.com/kb/ht1808

Similar Messages

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