There is no documentation about DFU anywhere in Apple Knowledge Base. Unlike the recovery mode, which is designed with an ordinary user in mind, the DFU mode was never intended for the public. The undocumented DFU stands for “Device Firmware Upgrade”. iPhone 8 and newer: click the Volume Up button, then click the Volume Down button, then hold down the Side button until the device reboots.iPhone 7 and iPhone 7 Plus: hold down the Side button and Volume Down button until the device reboots.iPhone 6s and earlier, Touch ID equipped iPads: hold the Home button and the Lock button until the device reboots.This is the Apple-recommended procedure for exiting the recovery mode: Let go of the buttons and let the device start up.Either keep holding the button combination or release and hold it down again until the Apple logo appears.Hold down the sleep/wake button or side button depending on device model until the device turns off.In general, you’ll use the following steps: The procedure for leaving the recovery mode is different for different devices.
Keep holding them until you see the connect to iTunes screen. On an iPhone 6s and earlier, iPad, or iPod touch: Press and hold both the Home and the Top (or Side) buttons at the same time.Keep holding them until you see connect to iTunes screen. On an iPhone 7 or iPhone 7 Plus: Press and hold the Side and Volume Down buttons at the same time.Then, press and hold the Side button until you see the connect to iTunes screen. Press and quickly release the Volume Down button. On iPhone 8 and later: Press and quickly release the Volume Up button.
Connect your device to your computer and open iTunes. Wait until you see the iTunes logo and the cable on the iPhone.Īpple recommends the following steps for entering Recovery mode:.Connect the device to computer with iTunes.Devices with a physical Home button, capacitive Home button and without the Home button employ different steps to enter Recovery mode.įor devices with physical Home buttons, follow these steps: Steps for entering the Recovery mode are different between iOS devices.
IPHONE X ITUNES MODE KEY UPDATE
Unlike DFU, the recovery mode is well documented in “ If you can’t update or restore your iPhone, iPad, or iPod touch”. To sum it up: if you are pursuing checkm8 or checkra1n extraction, consider switching the phone into recovery and only then to DFU mode. Interestingly, we could not confirm this on the latest iPhone 12. This is applicable to most models, including phones as old as the iPhone 5 and as new as the iPhone 8. For the purpose of exploiting the bootloader vulnerability, many experts have a greater success rate if they switched the device to recovery mode first, followed by switching to DFU. For a long time, we’ve seen reports of experts using a trick to increase their success rate of installing the exploit.
Before you beginīefore you begin, there is one thing to consider. Finally, DFU can be used to reset a locked phone (although you’ll be facing iCloud lock when setting it up, and all the data will be irreversibly gone). You can also use DFU for “Before First Unlock” (BFU) extractions. You also need DFU when performing passcode unlocks (currently, we support the iPhone 4, 5 and 5c only). Literally, you need DFU when performing checkm8 or checkra1n extraction of an iPhone 5 through iPhone X, or using limera1n for the same purpose on older devices. The procedure is undocumented, and the steps are different for the various devices. The ability to image the file system, decrypt the keychain and even do passcode unlocks on some older iPhone models has been made possible thanks to the checkm8 exploit and the checkra1n jailbreak, both of which require switching the phone into DFU.
IPHONE X ITUNES MODE KEY UPGRADE
The Device Firmware Upgrade mode, or simply DFU, just got a second breath.
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