Send and receive SMS messages AT command interface with "auto baud" detection uFL connection for external antenna Indicator LEDs for power and network connectivity The SIM800F GPRS / GSM Shield is based on the SIMcomm SIM800F Quad-band 850/900/1800/1900MHz module that delivers GSM/GPRS 850/900/1800/1900MHz performance for voice, SMS, Data, and Fax in a small form factor and with low power consumption, it is the absolutely substitute/upgrade version of the SIM900 module, with the same AT Commands for controlling and upgrade signal performance. Features: Any standard 2G SIM slides into a secure connector Send and receive GPRS data (TCP/IP, HTTP, etc.) Quad-band 850/900/1800/1900MHz - connect onto any global GSM network with any 2G SIM (in the USA, T-Mobile is suggested) Make and receive voice calls using a headset OR an external 8Ω speaker + electret microphone
