PiTalk
DIY Modular Smartphone on Raspberry Pi
Screenshots
Hunter's comment
PiTalk is the first ever smartphone on Raspberry Pi Zero, Made 100% in the United Kingdom By SB Components The base of the design is the PiTalk Raspberry Pi, 3G/GSM shield with standard 40-pin Raspberry Pi header. The PiTalk Shield also includes a cellular 3G module that gives you the features you find on a regular smartphone.
Link
Contributors
Hunter: 
This is posted on Steemhunt - A place where you can dig products and earn STEEM.
View on Steemhunt.com