How much do I love this DIY cell phone? Quite a bit! I’m not trading in my iPhone for this (yet) but I love the idea of being able to order parts from SparkFun and Adafruit and dropping in a SIM card and having a mobile phone for under $200.
I can also imagine that such hardware could be incorporated into various projects where voice or text communication could come in handy. I know that some folks attach phones to balloons or incorporate them into other remote monitoring systems… so what if you could extend this simple DIY phone hardware to be exactly what you want to fit your project?