Get your Arduino project talking across a cell network with the GSM shield.
The Arduino team is now making a real go of the "Internet of Things" concept. Add cell-compatibility to you project with the GSM shield, which lets your project:
Plug your Arduino-compatible to this shield, and you're well on the way to building your own smartphone project!
The shield uses a quad-band M10 Quectel radio modem, and is controllable by old-school 'AT' style commands that were common in the days of dial-up modems. Use these commands in Arduino sketches to talk to the shield via the Rx/Tx lines (and the D7 pin for the modem's PWRKEY).
You will most likely be able to use your own provider's SIM for best billing & compatibility, but there is an included Telefonica Digital SIM that offers service in the following countries: