4G WIFI Wireless Fixed Phone Desktop Telephone GSM SIM Card LCD for Office Home Call Center Company Hotel Description：       4G WIFI Fixed Wireless Phone Congratulations on your purchase of the 4G Fixed Wireless Phone ETS-6688 (Hereinafter referred to as Phone). The Phone has been designed to operate with the latest wireless communication technology which has many advanced features and provides an excellent voice quality.     Technical Specifications: Model: ETS-6688 Color: Black Material: Plastic Module Chipset: Spreadtrum SC9820E ,Cortex A53 Dual-core, Clock: up to 1.3GHz Support DVFS SIM: Support 3V & 1.8 V SIM card Memory: MCP(4GB+2GB) LCD: 128x64 Working current: The paek current is less than or equal to 2A The maximum current for GSM calls is no more than 260mA WCDMA communication maximum current is no more than 500mA LTE paek call current is less than 750mA Standby current is less than or equal to 5mA GSM Band: GPRS/GSM: 1900/1800/900/850MHz WCDMA Band: 850MHz/1900MHz or 900MHz/2100MHz (optional) Max. emission power: FDD/TDD: Power Class 3( 23±2.7dBm) WCDMA: Power Class 3 (+24dBm +1/-3dBm) GSM/GPRS 850MHz/900MHz: Power Class 5 (+33dBm ±2dBm) GSM/GPRS 1800MHz/1900MHz: Power Class 0 (+30dBm ±2dBm) Reception sensitivity: FDD/TDD LTE:≤-97.3 dBm(QPSK PREFSENS,throughput≥95%)(An antenna has 10M broadband) WCDMA850/WCDMA900/WCDMA1900/WCDMA2100 : ≤-108dBm GSM850/EGSM900/DCS1800/PCS1900 : ≤-108dBm Data rate: GSM CS:UL 9.6kbps/DL 9.6kbps GPRS:171.2kbps WCDMA:UL 11.5Mbps/DL 42.2Mbps FDD:UL 50Mbps/DL 150Mbp GPRS Type: Class 12 3GPP protocol: R7.R8 LTE FDD rf technical indicators: 3GPP R9 CAT4 FDD,TDD/FDD receiving sensitivity more than 1 times higher than the standard of 3GPP. Features and Benefits: 2G Band:B2,B3,B5,B8 3G Band:B1,B2,B5B,B8 4G Band FDD:B1,B2,B3,B4,B5,B7,B8,B20,B28a,B28b;4G Band TDD:B38,B39,B40,B41 Frequency bands can be adjusted as required WIFI Standard:IEEE 802.11b/g/n VoLTE Voice FM Radio,SMS,MP3 Android 4.4.