How to update to iOS 8 straight from iPhone iPad iPod , no itunes needed

How to update without computer, how to download iOS 8 without deleting all your stuff, iOS 8 how to update without deleting photos.\r
No itunes necessary. Upgrade to iOS 8 instructions , tutorial.\r
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iOS 8 update from iOS7, How to install iOS 8, how to download ios8 , how does iOS 8 look like. Full tutorial step by step, How to update using itunes , how to update using iphone only , no computer.\r
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Complete iOS 8 , non beta version