sim900b module original stock; 1.Quad-band GSM/GPRS module 2.GSM/GPRS 850/900/1800/1900MHz sim900b module original stock SIMCom presents ... solutions. Featuring an industry-standard interface, the SIM900 delivers GSM/GPRS 850/900/1800/1900MHz performance for voice, SMS, Data, and ... / 1800/ 1900 MHz GPRS multi-slot class 10/8 GPRS mobile station class B Compliant to GSM phase 2/2+ -Class 4 (2 W @850 ...