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some of them are available in 4G as well, even if, you are correct, then tend to disappear over time, at least the ones with analog audio
--> https://www.waveshare.com/wiki/A7670E_Cat-1_HAT
Jean-Philippe_Rey
Yeah well, everyone needs a hobby. :D
Definitely some interesting phone modules, albeit most of the breakout all-in-ones seem to be 2G only. So a custom board is probably the way to go, might have a play.
Yeah I still use an ancient Sony dumbphone when I don't need connectivity, but I like the flexibility of the js runtime you've created with espruino which you'd still be missing on a candybar.
Just thinking the hybrid of a flexible "bangle" style ecosystem on a handheld but with the added built in connectivity and obviously phone functionality might be fun.