David Mellis. Four Principles for an Ecosystem of OpenSource Everyday Devices -
The DIY Cellphone is a working (albeit basic) cellphone that you can make yourself. It can make and receive phone calls and text messages, store names and phone numbers, and display the time. It builds on the hardware and software in the Arduino GSM Shield but extends it with a full interface, including display, buttons, speaker, microphone, etc. The source files for the cellphone are hosted on GitHub (hardware, software), which also includes an issue list where you can file bug reports or request enhancements.
Adafruit will be at the Open Hardware Summit — September 6, 2013. Becky Stern, Director of Wearable Electronics will be speaking – Wearables at the intersection of electronics and craft. Adafruit is sponsor and supporter of the Open source hardware association and the Open Hardware summit. Our posts are all here and follow the action on twitter with #ohsummit.