Introducing the M3, an all-in-one extension handset designed for both IP PBX and mobile voice services. It seamlessly roams between WLAN and LTE networks in VoIP mode. Powered by a quad-core SoC platform, the M3 integrates Wi-Fi 2.4/5G, keypad, LCD, codec, SIP stack, and more, ensuring over 7 days of standby time. With Android OS compatibility, it offers unmatched stability and expandability. Easily deploy the M3 via the Vogtec online DIY cloud system or through standard auto provisioning. Key features include FoTA updates, TR069 management, a 2.4" color LCD, vibration alert, 1500mAh replaceable battery, ENC, SIP video intercom support, and BT4.1 headset compatibility.