General Features:

• Dual-Band 900/ 1800 MHz
• GPRS multi-slot class 10/8
• GPRS mobile station class B
• Compliant to GSM phase 2/2+
• Class 4 (2 W @900 MHz)
• Class 1 (1 W @ 1800MHz)
• Dimensions: 24mm x 24mm x 3mm
• Weight: 3.4g
• Control via AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands)
• SIM application toolkit
• Supply voltage range : 3.1 ... 4.8V
• Low power consumption: 1.5mA(sleep mode)
• Operation temperature: -40°C to +85 °C

Specifications for Fax:

• Group 3, class 1

Specifications for Data:

• GPRS class 10: max. 85.6 kbps (downlink)
• PBCCH support
• Coding schemes CS 1, 2, 3, 4
• CSD up to 14.4 kbps
• USSD
• Non transparent mode
• PPP-stack

Specifications for SMS via GSM/GPRS:

• Point to point MO and MTSMS cell broadcastText and PDU mode
• Software features
• 0710 MUX protocol
• embedded TCP/UDP protocol
• FTP/HTTP

Enhanced version add following features:

• FOTA
• MMS
• Embedded AT

Specifications for Voice:

• Tricodec
• Half rate (HR)
• Full rate (FR)
• Enhanced Full rate (EFR)
• Hands-free operation (Echo suppression)
• AMR
• Half rate (HR)
• Full rate (FR)

Interfaces:

• Interface to external SIM 3V/ 1.8V
• analog audio interface
• RTC backup
• SPI interface
• Two Serial interfaces
• Antenna pad
• I2C
• GPIO
• PWM
• ADC

Compatibility:

• AT cellular command interface

Certificates

• ROHS
• TA
• REACH 

Documents:

• SIM900A_HD_V1.01
• SIM900_ATC_V1.00