Please help me
I Have an iPhone 4s and I can't update iOS past 7.1.2 and others i know of have. How can/do I fix this?
iPhone 4S, iOS 7.1.2
Are you sure your iPhone model is 4s? 7.1.2 is the latest possible version for iPhone 4.
Take a look at these articles:
Resolve iOS update and restore errors in iTunes - Apple Support