ANYSECU W8 4G Network Radio Android 8.1 GPS WIFI Mobile Phone Work With Real-ptt Zello with Earphone NETWORK & CONNECTIVITY Bands 2G: GSM 850/900/1800MHz 3G: WCDMA 850/900/1700/2100MHz 4G: FDD-LTE B1/3/4/5/7/8/20/28A/28B, TDD-LTE B34/38/40/41 Wi-Fi IEEE 802.11 b/g/n BT V4.2 NFC Optional GNSS Support GPS/BDS/GLONASS I/O INTERFACES Micro SIM card slot *2 TF card slot *1 USB Type-C *1 FEATURES PoC function Support SOS function Support