Loosen the power button (but not the volume down button) after the iPhone screen has been off for three seconds.Hold the power and volume down buttons at the same time when the iPhone is linked to a PC or Mac.(An iTunes symbol appears on the screen.) The recovery mode shows when you hit the volume down button.

Turn off the iPhone and connect it to the PC / Mac by pressing the volume down button for 3 seconds.“Recovery mode” is activated on the iPhone 7. The message “identify an iPhone in recovery mode” will appear in iTunes.After three seconds, release the power button when the iPhone’s screen is off.Hold the power and home buttons at the same time when the iPhone is linked to a PC or Mac.The “DFU” mode is activated on the iPhone 6s and prior generations. Now press and hold the home button to enter recovery mode.To connect the iPhone to the PC / Mac, turn it off and press and hold the home button for 3 seconds.The iPhone 6s, as well as prior versions, enter “recovery mode.” The system utilises iBoot to restore and update the firmware in recovery mode, however in DFU mode, the system does not activate iBoot, allowing you to degrade the firmware (if the firmware does not turn off validation). The most significant distinction between iPhone recovery mode and DFU mode is whether or not the iBoot is enabled.

Iphone restore firmware