to begin. 3uTools provides on-screen instructions to help you enter this mode based on your device model. Select Flash Mode
Once the green "Success" message appears, your device will reboot. If you used "Retain Data Flash," all your data will still be there. If you used iTunes Flash, you will see the "Hello" setup screen.
: When a device is stuck in a boot loop or Recovery Mode and a standard flash fails. Downgrading iOS