DFU refers to Device Firmware Update. There may be many reasons you could want to enter DFU mode. If you want to jailbreak your iPhone or un-jailbreak it, Device Firmware Update mode can be used. It can also be used to update from an expired beta. Apart from that, if there is a problem in your iPhone and nothing else seems to be working, including recovery mode, Device Firmware Update mode can be your last hope.
So what exactly happens in Device Firmware Update mode?
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Whether you're running the best iPhone, like the iPhone 12 Pro with iOS 14, or an older device, DFU is a last-resort fix. It also works on iPad or even an iPod touch. With DFU mode, you can get your device back into a proper, working order. The Serial DFU method uses the hardware serial connection to load new firmware onto the Bluetooth Xpress module. This method should only be used when OTA is not possible or not practical, and in a controlled environment such as a factory production test line. Silicon Labs provides a command line DFU utility for performing serial port updates. How to Enter DFU Mode on iPhone 6s and Earlier. Connect your iPhone 6s, SE 1st generation, or earlier to a computer. Press and hold the right side On/Off button for 3 seconds. Next, while still pressing the On/Off button, press and hold the Home button from the front of your device.
The DFU puts your phone in a state where it can communicate with iTunes on your PC (whether Windows or Mac, works for both). However, this mode doesn't load the iOS or the boot loader. Because of this, the device can be recovered from any state. This, in fact, is the main difference between Recovery mode and Device Firmware Update mode.
- Open to DFU Tool directory; and right click “intel-realsense-dfu.exe”and choose, “Run as administrator”. You can also open a command line as admin and run the “intel-realsense-dfu.exe” from there. Plug in D400 series camera/s to host USB3.1 port 5. Command line window should appear with main menu of tool being displayed.
- DFU Flash Tool v2.03 (Broadcom) – Latest Version Last modified on before 5 months by Org THE DFU Flash Tool (Broadcom Firmware Upgrade Tools v2.03) is released and available to download without waiting. So, If you already using its old version DFUTool (2.03) on your PC and laptop.
It is best to try recovery mode or iOS system recovery before trying Device Firmware Update mode. The DFU mode is a last ditch attempt to get your phone out of any trouble unless you intend to jailbreak your phone, or un-jailbreak it, in which case it must be done. Recovery mode or system recovery can solve most problems.
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In this article, we have collected 6 popular DFU tools, and we hope it will be helpful for you to enter DFU mode.