Working frequency band: GSM 850 / 900 / 1800 / 1900 MHz; Maximum transmitted power: EGSM900 / GSM850 Class4 (2W); GSM1800 / GSM1900 Class1 (1W); Receiving sensitivity: < -107dBm; Working temperature: - 30~75'C; Storage temperature: - 40~85'C; Power supply voltage: Recommended value 3.3V~4.2 V (3.8 V); Average standby current: < 3.0 mA; Power consumption: Shutdown current: 50 muA; Standby: average current MFRMS = 2 I < 3.0 mA;MFRMS = 5 I < 3.0 mA;MFRMS = 9 I < 3.0 mA; GPRS class (maximum 10) : Itypical = 460 mA; Agreement: Support GSM/GPRS Phase2 + / 2; AT command: GSM standard AT commands V. 25 AT commands Huawei extend the AT command; Application interfaces (68pin LCC interface); UART interface (support 8 line serial interface) 1 and UART 0 interface (2 wire serial interface); Standard SIM card interface (1.8 V or 3 V); Two way analog audio interface; The power interface: Network status indicator light control interface; The antenna interface: Antenna welding plate; Voice business: Analog voice support two road; Short message service: To support the new SMS alerts text messages; Support SMS management: read the text messages delete messages storage condition the message list; Support PDU mode; GPRS data service: GPRS CLASS 10; Encoding CS 1 CS 2 CS 3 4 CS; Biggest downlink transmission rate: 85.6 KBPS; Maximum uplink transmission rate: 42.8 KBPS; Support PBCCH; Embedded TCP / IP protocol support for multiple links; Support for CSD data service the highest rate of 9.6 Kbit/s; Size: 24 mm x 24 mm x 2.95 mm; Weight: <3.5g; Authentication information