Link: https://linuxiac.com/makerphone-2-0-is-an-open-hackable-4g-phone-you-build-yourself/

CircuitMess launches MAKERphone 2.0, a solder-free ESP32-S3 phone with 4G, MicroPython and C++ support, plus modular hardware expansion.

For beginners, the company provides VibeBoy, an AI-assisted coding environment that lets users describe what they want to build in plain English

audible sigh

Aside from that, any modern communications device should be capable of using some sort of modern encrypted calls and messaging. Signal, Matrix, XMPP, whatever, give me something

Has anyone been able to find any info on the modem outside of "A 4G modem for connectivity"

And how they got it network operator and regulatory approved?

Which networks and carriers does it work on?

MAKERphone 2.0 uses 4G LTE Cat-1 with 2G fallback and works with any carrier that gives you a nano-SIM.

This seems quite vague and while i can't say for sure but as far as i know you can't just slot a sim into a modem with any arbitrary IMEI and it works on the long term.