Alcatel SMARTFLIP 4052R | 4G LTE | 4GB Flip-Phone | Bluetooth, WiFi, Big Buttons | (GSM Unlocked) - Volcano Black

The phone supports HD calling via LTE, WiFi calling via 2.4GHz support, and also falls back to 3G or 2G if necessary. The call quality was really good and conversation on both sides was crisp and clear with little disturbance.