how to wipe iPhone 3G data. You can wipe your iPhone 3G clean with restore mode. All data on your iPhone will be deleted and it will be reset to iphone factory default settings. Firstly turn off your iPhone and hold down the Home button while connecting to your computer with iTunes already open and ready for a connection. then iTunes will prompt you to perform a software restore. then your iPhone will obviously be wiped. if your data on iphone is important, you had better backup it before wipe your iphone.

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