Summary: Learn how a SIM card works, the small card inside GSM cell phones, make a SIM card reader, view deleted messages, phone book entries and clone or crack a SIM card. Citizen Engineer is an online video series about open source hardware, electronics, art and hacking by Limor (Ladyada) Fried of Adafruit Industries and Phillip (pt) Torrone of MAKE magazine. Modify a retired payphone so it can be used as a home telephone and for VoIP (Skype). Then learn how to modify the hacked payphone so it accepts quarters - and lastly, use a Redbox to make "free" phone calls from the modified coin-accepting payphone.
