Lora messenger using repurposed Nokia E63 components (hackaday.com)

This sounds like an interesting project, a custom-designed PCB based on an ARM Cortex-M7 that turns an old Nokia E63 into a LoRA messenger.

Source on github (https://github.com/TrevorAttema/OTGMessenger)

An approach like this might also be interesting for a Precursor-like project (https://www.crowdsupply.com/sutajio-kosagi/precursor).