Asus Zenfone Selfie hard reset When the device is off, press (also hold) the volume down key and then press (also hold) the power key. After the device vibrates, release the power key (keep holding the volume down key) to enter recovery mode. Select "wipe data/factory reset" by volume down … [Read more…] about What exactly is Hard Reset Asus Zenfone Selfie ZD551KL