A Privacy-respecting Eco-conscious affordable Hybrid Dumb / Smarter Phone

Design goal: to create a simple-to-use upgradeable phone that respects privacy, is long-term affordable, does not end up in landfill after twelve months due to software updates being unavailable, and many more issues.


  • Built-in Embedded Controller (STM32F072) running the "phone" side in "dumb" mode
  • EOMA50 Modular Upgradeable Computer Card Slot: optional upgrade to "smarter" phone
  • HX8357D-based 480x272 LCD with CTP: dual LCD interfaces (SPI and Parallel Port)
  • Hard physical kill-switch for the 3G Modem (cuts all power)
  • SIMCOM or SEW291 Penta-band WCDMA/HSPA/GSM/GPRS/EDGE 3G Modem
  • Removable battery
  • 3D-printed casework


  • http://tinkerphones.org/
  • http://shr-project.org/trac