RS232 GPRS Modem / GSM Modem, Support SIM Card, GSM: 900 / 1800MHz Sign Random Delivery
3g gsm/gprs modem : JRI-corp
CS-GPRS & CS-GSM: Mobile Network Kits
Moxa Americas Inc. OnCell 1-Port RS-232 GSM/GPRS Modem - WirelessUnits.com
Amazon.com: OSTENT GSM GPRS Modem with Wavecom Q2426B Module 850/1900MHZ COM/RS232/Serial Port at Commands SMS MMS Voice Call US Plug Power Adapter : Electronics
Cellular Industrial modems 2G (GSM/GPRS) for M2M | E-shop SECTRON