Guide to Upgarde your iPhone & iPod IOS 9
First you should checked that your devices is ready to install IOS 9. Following are the compatible devices:
The very first step, take a back up whenever you want to upadating your iPhone
You can also take a back up through iTunes.
As shown in pic:-
Go to iPhone in iTunes and select summary tab and Click on Back UP button
The update needs the things to install IOS 9.
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