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DFU Mode is more powerful than Recovery Mode, and is unsupported and undocumented for us, the end user. It lets an iOS device connect and talk to iTunes (or its Finder equivalent in macOS Catalina), without loading the bootloader, or iOS itself.
We've talked before about some basic troubleshooting steps for when your device won't power on---performing a hard reset and restoring iOS itself---but the final step on that troubleshooting journey, when nothing else works, is the Device Firmware Update (DFU) mode.
Putting your iPhone in DFU mode starts off just like a hard hard reset. Quickly press and release the volume up button, then quickly press and release the volume down button, and then press and hold the side button until the screen goes black.
How to Enter DFU Mode on iPhone 6s and iPhone 7. DFU mode lets the device interface with iTunes, update the firmware, and restore the OS without automatically installing the last downloaded...
DFU (Device Firmware Update) mode is a special state your iPhone can enter for troubleshooting serious software issues. It’s a more powerful tool than Recovery Mode, as it bypasses the iOS bootloader, allowing for a complete restore of your device’s firmware.
Release the Sleep/Power button, but continue to hold the Home Button (or Volume down button on an iPhone 7 or newer) for 5 seconds. If the iTunes logo and message appear, you held the button for too long and need to start again. If the device screen is black, it's in DFU Mode.
DFU (Device Firmware Update) mode is a great way to update firmware, jailbreak, installing an old version of iOS or just rescue an unresponsive device. Here's how to put an iPhone -...
If your iPhone has a black screen and the Side button doesn’t function, it could be because your iPhone 12 is in DFU mode. See the tutorial for exiting DFU mode below. How to force...
DFU mode (standing for Device Firmware Update) on the other hand restores an iPhone if a restart or entering standard Recovery Mode doesn't solve the problem you're experiencing.
How to put your iPhone in DFU mode. The steps to enter DFU mode depends on your iPhone model. First, ensure your device is powered off and connected to a Mac or Windows PC with iTunes...