The shield is based around the SIM900 GSM/GPRS radio module ... This library of code includes the methods necessary for an Arduino to function as a cell phone (answer, hang up, dial a number ...

While [Ilias Giechaskiel] was waiting for his SIM900 shield to arrive, he decided to see what he could do with an old Nokia 6310i and an Arduino ... provides all source code needed to replicate ...