Oh man.
Again one of those projects where someone glues together an Arduino (ESP, Raspberry,...), a modem module and a battery.
I'm not sure where this is "educational" (except for the creators, of course).<p>I've been using hacky phones all my life (N900, N9, Sailfish, Ubuntu Touch, Pinephone, Librem5) and I really really really just want people to finally concentrate their efforts and build a (non-android) open-source phone (HW + ecosystem) that's actually <i>usable</i>.<p>Sorry for this non-constructive post, but this is a topic that bothers me quite a lot.