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The Arduino & Rasberry PI GSM/GPRS/SMS/DTMF Shield answers your needs for a fully integrated, functional and affordable cellular modem shield / platform. Smart complete design of this shield brings you the flexibility and easiness of integration, whatever your platform and application. Beyond Arduino / Rasberry PI / other hobby / DYI platforms integration, the shield can be easily and in a timely manner incorporated into your equipment regardless of your previous experience in modem technology. The shield represents your best choice for usage into a wide range of designs requiring robust and reliable performance.