Apple iPhone software updates are meant to fix bugs and other errors that occur in earlier versions of the software, but sometimes a software update can cause more problems. If you experience problems such as frequent application crashes, slow response time or hard disk failure, you'll need to uninstall the iPhone software, which requires restoring your iPhone to its original factory settings. Before restoring your iPhone, back up your current settings in iTunes, as an iPhone restore erases all of your phone's data.
Plug the USB cable into the bottom of the iPhone, and connect the other end to the USB port on your computer.
Click "Start," "All Programs," "Apple" and "iTunes" to run iTunes on your PC. For Macs, open the Applications folder in Finder and double-click the "iTunes" icon.
Click the link in the resources section to download the iPhone OS 2.1 software. Save the file to your desktop.
Click the "iPhone" tab in the iTunes sidebar and click "Restore." Click "Back up" and "Restore" and wait for the iPhone to reset itself to the original settings.
Once the restoration is complete, select "Set up as a new iPhone" and click "Continue." Hold the "Shift" key down and click "Check for Update." Select the OS 2.1 file and click "Choose" or "Open" to install the 2.1 software.
- Apple Support: Backing Up, Updating and Restoring your iPhone and iPod Touch Software
- "iPhone For Dummies"; Edward C. Baig and Bob LeVitus; 2009
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