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iPhone How To?

Friday, March 07, 2014
Enter DFU mode

DFU mode means Device Firmware Upgrade.

Restoring a device after it enters DFU mode returns it to a known good state with the certainty that only unmodified Apple-signed code is present.

DFU mode can be entered manually:

First connect the device to a computer using a USB cable, then hold down both the Home and Sleep/Wake buttons.
After 8 seconds, release the Sleep/Wake button while continuing to hold down the Home button.

Note: Nothing will be displayed on the screen when it’s in DFU mode. If the Apple logo appears, the Sleep/Wake button was held down too long.

****** iPhone 7 and later models *******

Press and hold Power and Volume Down keys at the same time: you’ll press and hold both the keys for exactly 10 seconds. After 10 seconds, let go of the Power key but keep holding the Volume Down key for an additional 10 seconds. And there you go, your iPhone 7 is now in DFU mode.