SIM900A GSM GPRS Module with RS232 Interface and SMA Antenna Modem is built with Dual Band GSM based SIM900A modem from SIMCOM. It works on frequencies 900MHz. SIM900A can search these two bands automatically
SIM7600CE GSM GPRS Module is Multi-Band LTE-TDD/LTE-FDD/HSPA+ and GSM/GPRS/EDGE module solution in a SMT type which supports LTE CAT1 up to 10Mbps for downlink data transfer.