SIM808 instead of SIM908 module GSM GPRS GPS Development Board IPX SMA with GPS Antenna available for Raspberry Pi for arduino - ASK Electronics
SIM808 GPS/GPRS/GSM Arduino Shield - RobotShop
Elecrow Sim808 Bluetooth Gsm Gps Shield For Arduino Simcom Quad-band Sim808 Gsm/gps/bt Module 3 In 1 Developed Board 3 Antennas - Integrated Circuits - AliExpress
SIM808 GPS/GPRS/GSM Arduino Shield - RobotShop
Elecrow Crowtail Sim808 Module Gprs Gsm Gps Development Board Gsm And Gps Two-in-one Function Module With A 3.7v Lithium Battery - Integrated Circuits - AliExpress
SIM808 GSM/GPRS/GPS Module With Antennas - Senith Electronics