Introducing the D379I, featuring a deeply customized Android system for optimal compatibility, stability, and extensibility. It includes a 2.8" 320x240 color LCD and offers both inbuilt and external WiFi antenna options with 2.4/5G WiFi support. The D379I supports Bluetooth and 3.5 mm headsets, and includes auto-provisioning with TR069 and FoTA. Additional features include VMS SaaS for online configuration, backup, and management, dual-line indicators with individual SIP account profiles, customizable soft keys, navigation keys, and line keys. It has a full duplex speakerphone with advanced audio echo cancellation, a large phonebook (up to 1000 contacts), call history (up to 200 records), and an optional inbuilt battery.