Restore Broken iPhone with Recovery Mode
iPhones, no matter how sophisticated, do occasionally have problems. At some point you may have to push your phone into recovery mode. This is basically a manual way of rebooting and restoring your phone.
Turn off the phone by holding the “Sleep/Wake” button for about five seconds and then sliding the red slider. Once it’s off, press and hold the “Home” button and plug your iPhone into your computer with iTunes installed. Keep holding the “Home” button until you see a dock cable pointing to the iTunes icon. Once you see this image, you can release the Home button.
Open iTunes, if it isn’t already, and you will be told that “iTunes has detected an iPhone in recovery mode.” Click “OK” and you will be taken to the iPhone pane. Click “Restore” and you’re done. Depending on what is wrong with your iPhone, it may take awhile to do a full restore. Once you’re done, you should again have a perfectly working iPhone.
If this doesn’t solve your problem, you may need to restore using DFU (Direct Firmware Upgrade) mode. To enter this mode, plug in your iPhone and turn it off. Hold down the “Home” and “Sleep/Wake” buttons for about twelve seconds. You’ll briefly see the silver Apple logo and then your phone will appear to turn back off. Release the “Sleep/Wake” button but continue to hold the “Home” button until you see a message in iTunes stating that it has detected an iPhone in recovery mode. Choose “Restore” and you should be fixed right up!
If this doesn’t fix your problem, your iPhone may require a visit to the Genius Bar. Usually they are extremely helpful and can troubleshoot your phone to fine the source of the problem.