Resurrecting flip phone typing as a Linux driver

I dream of building an apple watch case that adds a T9 bluetooth keyboard. Turn the standalone Apple Watch into the dumbphone I've always wanted.

This is exactly my dream too, especially after seeing the Apple Watch prototype dumbphone cases they used to conceal them in public[0]. It would be a glorious re-purposing of the Apple Watch to serve the most diehard fans of the killed iPhone Mini.

Sadly the Apple Watch doesn't do proper external text input. You can connect a bluetooth keyboard, but it works by sending all input via the VoiceOver accessibility feature, which is slow and fidgety.

[0]https://cdn.idropnews.com/wp-content/uploads/2021/06/1509254...