Connect the device to a computer using a USB cable.
Quick-press the Volume Up button
Quick-press the Volume Down button
Hold down the Side button until the screen goes black, then hold down both the Side button and Volume Down button.
After about 5 seconds, release the Side button while continuing to hold down the Volume Down button.
If the Apple logo appears, the Side button was held down for too long.
Nothing will be displayed on the screen when the device is in DFU mode. If open, iTunes will alert you that a device was detected in recovery mode.
If your device shows a screen telling you to connect the device to iTunes, retry these steps.