IOS update

To update to the most recent, compatible version of iOS, please see: Update your iPhone, iPad, or iPod touch - Apple Support

And: If your iPhone, iPad, or iPod touch won't update - Apple Support

If the above Apple articles do not help, please post back with relevant information. 

If you're referring to an iPhone 6s or newer, update it from a computer or through the Software Update function in Settings. Otherwise, try downloading them to a compatible unit on the same Apple ID first.

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