HT201274: Erase all content and settings on your iPhone, iPad, iPod touch, or Apple Watch
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Q: If i update my ipod 4 genration touch will it delete everthing on it
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Dec 23, 2013 5:07 AMby lllaass,If you update via iTunes, all your synced media like apps and music has to be in the iTunes library otherwise they will be lost after the update.
iOS 4: Updating your device to iOS 5 or later
You need iTunes 10.7 or later o the computer.
