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Arduino GSM Shields for Wireless Communication - Arduino A000044, The Arduino GSM Shield with antenna connector is designed to provide internet connection, via a GPRS wireless network, to an Arduino board. It will be possible, with the appropriate network operator permissions, to connect to the internet, make and receive telephone calls and send or receive SMS messages. To connect, the module plugs into an Arduino board and a SIM card from a GPRS operator is inserted into the shield SIM card slot. The shield utilises a quad-band radio modem and communicates with the board using AT commands. Arduino GSM Shield with Antenna Connector A000044 Board