This is a phone design for the next generation, The modular design helps against E-waste. the idea is that you can buy a pre built model though me or you can make your own, after a few years you can swap parts out to keep the phone for running longer.
The current idea is to use off the shelf parts.
Links:
Files and compatibility: https://docs.google.com/spreadsheets/d/1RRsYXIaR6VpZrMx9XbYSNNYPVBJPBTRpmUzjcQp7AMI/edit?usp=sharing
I have been wanting an open source phone for some time (at least 2009), so this looks very interesting!