Yes sir, we are talking about a 30-foot tall GSM cell base-station that would normally cost a bomb, but a team of motivated (and obviously brilliant) engineers managed to recreate its functionality with the help of some open-source software and a Raspberry Pi. Heck, one can even make calls and send text messages over the created network, although the coverage of the radio signal had to be cut in order to not to interfere with local carriers’ spectrum. What other Raspberry Pi projects out there would you like to see?