what firmware does my iphone 4 need to b on to use itunes version 12,1,2?
whill 7.1.2(11D257) on an iphone 4 work with latest iTunes 12.1.2?
iPhone 4, iOS 7.1.2
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Yes, the current version of iTunes will work with all older versions of iOS firmware. Each version of iOS has a minimum version of iTunes it is compatible with. If you ever need to restore your iPhone it will be restored with the highest version of iOS that is compatible with the device.
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