The phone uses an ESP32 at its core, with a SIM800L GSM modem to interact with the cell network, including retrieving the system time. A small battery is included as well as all of the support circuitry for charging it as well as a USB interface that can communicate to a PC. The operating system for the phone is built from the ground up as well, with a touch screen interface allowing the user to make phone calls, send text messages, store contacts, and a few other basic features.
Yes, the modem is 2G, but I'd imagine it would not be too difficult to get 3G or 4G modems, but I'm suspecting that may not be open-source. Of course, this is a 100% self repairable phone.
It runs the paxos_8 operating system written in C, and it looks like he is actively updating it, as it received commits just yesterday.
See
Open-Source Cell Phone Based On ESP32
Over the past decade or so, smartphones have exploded in popularity and seamlessly integrated themselves into nearly every aspect of most people’s lives. Although that comes with a few downsi…
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ESP32
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