DFU mode is a state that you can put your iPhone, iPad, or iPod into where it can interface with iTunes but does not load the iPhone operating system or boot loader (this is what really differs DFU mode from recovery mode). DFU stands for Device Firmware Update.
The way to exit iPhone DFU Mode is the same with that to exit iPad DFU mode and iPod DFU mode.
1. Hold down the home and power button for about 15 seconds, this shuts off the iPhone
2. Press the power button to boot the iPhone
It typically works the same for iOS-based devices. For more infomation, just read how to exit iPod/iPhone/iPad DFU mode.
The most key difference between DFU Mode and Recovery Mode is iBoot. iBoot is the bootloader on iPhone OS devices, it acts on restore while iPhone is in Recovery Mode, iBoot makes sure that you are flashing a firmware version greater than or equal to a current one. Recovery mode uses iBoot during restoring or upgrading your iPhone while DFU mode bypasses the iBoot so you can downgrade the current firmware because there is no iBoot agent during the DFU mode.
DFU mode is not recovery mode. Recovery mode has a red iTunes logos that says connect to iTunes. In DFU mode, the iPhone screen backlight is not even on and the display is blank. If you have anything on your display you are not in DFU mode.comments powered by Disqus