ZTE Blade A51S factory unlocked 4G LTE, VoLTE 64GB Memory/2 RAM Cell Phone BL

4G Bands: 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, HSDPA LTE Speed. LTE, VoLTE. A fingerprint sensor is one of the easiest and most secure ways to protect your Smartphone. The proximity sensor detects when a user is holding the phone near their face during a call and turns off the display to prevent keypad presses and battery consumption from the display.