Putting your iPod Touch into its Device Firmware Upgrade mode bypasses the currently installed operating system, allowing you to upgrade, restore or downgrade your device's firmware. Software ...

DFU, short for Device Firmware Update, is a special mode that enables a computer to update its firmware. In DFU mode an iPhone can still communicate with iTunes but without iTunes automatically ...

From a hard reset to DFU Mode, here’s what actually works Reviewed by Christine Baker Try a hard reset first, which can quickly fix most iPhone white screen issues without losing data. If a hard reset ...