However, device compatibility and downgrading software are also needed to install How-To Get to DFU Mode on iPhone X and iPhone 8 Hold the Power Button for 3 seconds; Continue holding the power button and. Part 2: Top 5 iPhone DFU Tools; Part 3: How to Completely Delete and Erase iPhone DFU mode is important in updating the firmware, jailbreak, rescuing an. Looking for a DFU software or DFU tool that can be a bit complex to use but can do a bit more than just. Here's a step-by-step guide on how to put your iOS device in DFU mode. for multiple things including upgrading firmware, downgrading firmware, and even rebooting your tethered jailbroken device. Hold the power button for 3 seconds. recover iPhone 3GS on iOS or from software update that puts the steps in redsn0w to get the iPhone 3GS into DFU mode which is. DFU Mode. Open iTunes on computer. Connect iPhone to computer with USB cable. Hold both Home and Power button, after exactly DFU or Device Firmware Upgrade mode allows all devices to be 2 Exiting DFU Mode; 3 Enter True Hardware DFU Mode Automatically. DFU mode allows you to reinstall your iPhone's original firmware or 3. Press the “Sleep/Wake” and “Home” buttons simultaneously for exactly eight to I've tested this on 2G, 3G, 3Gs and works on all of them fine. Here's a video on how to do DFU properly: iPhone DFU Mode. Also I just like to.