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5 steps for installing iOS 4

Learn how to install iOS4 on your iPhone or iPod Touch in five easy steps.

Apple's iOS4 is spreading out to iPhone and iPod Touch owners today. Upgrading the firmware on your iPhone or iPod may be old hat for some of you, but if this is your first time around, here's the iOS 4 upgrade process infive easy steps.

The iOS 4 upgrade is free for both iPhone and iPod Touch, but excludes first-gen models.