Quad-band 850/900/1800/1900MHz GPRS multi-slot class 12/10 GPRS mobile station class B Meet the GSM 2/2 Standard FM: Frequency range 76 ~ 109MHz 50KHz tuning step Size : 15.8 x 17.8 x 2.4 mm Weight : 1.35g Control via AT commands (3GPP TS 27.007 27.005 and SIMCOM enhanced AT command set ) SIM Application Toolkit Supply voltage range : 3.4 ~ 4.3V Low power consumption Operating temperature range : -40 ~ 85'C Fax Group 3 class 1 Data transmission GPRS class 12 max 85.6 kbps ( downlink / downstream ) Support PBCCH Coding schemes CS 1 2 3 4 PPP-stack CSD up to 14.4 kbps Support USSD Nontransparent SMS Point MO and MT SMS Broadcast Text and PDU mode Software features 0710 MUX protocol Embedded TCP / UDP protocol FTP / HTTP MMS E-mail DTMF detection Interference detection Voice Tricodec - Half rate (HR) - Full rate (FR) - Enhanced Full Rate (EFR) AMR - Half rate (HR) - Full rate (FR) Supports echo suppression algorithm Interface 88 LGA pads Two analog audio interfaces PCM interface Support RTC Serial Interface USB interface SIM card interface (3V / 1.8V) Keyboard Interface GPIO ADC GSM antenna pad FM antenna pad Compatibility AT cellular command interface