If this style of phone is more your speed, take a look at this DIY cell phone which takes care of everything a phone really needs to do. (Google Translate from French) The phone uses an ESP32 at ...

[bobricius] has a few more tricks up his sleeve for his next version of this DIY cell phone. The nice, but hard to source, display will be replaced with a Charlieplexed 22×5 array of LEDs on a ...