Iphone dfu mode Even though the screen is black, that doesn't mean the device can't be interfaced with either iTunes or a custom firmware client (for jailbreaking, etc). When you are in DFU mode your iPhone screen will be completely black
Hold down the sleep/power button and home button together for exactly 10 seconds, then release the power buttonĬontinue to hold down the Home button until a message appears in iTunes telling you an iPhone in recover mode has been detected Turn the iPhone off (hold down the power button at the top of the iPhone)
For instance, if you got the iPhone OS 4 download installed and decided you would rather have a prior version of the firmware on your iPhone, you would need to do this through DFU mode.Ĭonnect the iPhone to your computer and launch iTunes This can serve to downgrade to a prior iPhone firmware and operating system, or to use a custom firmware that is required for a jailbreak or SIM unlock. The primary reason people need to access DFU mode on their iPhone is to change the firmware on the device.
ĭFU mode is a state that you can put your iPhone 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). How to enter DFU mode and what small simple rules you should be aware of when trying to enter DFU.
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