The SIM800H module is a complete Quad-band GSM/GPRS solution in a LGA type which can be embedded in the customer,it has a set of TTL level serial interface, a set of power supply interface. Besides, there are a set of antenna interface on this module.
SIM900 GPRS/GSM Shield Development BoardSIM800L V2.0 5V Wireless GSM GPRS module SIM800Lmodule PCB antenna