SIM900 GSM-GPRS shield
Supports Quad-band: GSM850, EGSM900, DCS1800 and PCS1900
Connect onto any global GSM network with any 2G SIM
Make and receive voice calls using an external earphone & electret microphone
Send and receive SMS messages
Send and receive GPRS data (TCP/IP, HTTP, etc.)
Scan and receive FM radio broadcasts
Transmit Power:
Class 4 (2W) for GSM850
Class 1 (1W) for DCS1800
Serial-based AT Command Set
U.FL and SMA connectors for cell antenna
Accepts Full-size SIM Card