The Mecha Comet is made for hackers and makers, running Debian with a custom touch UI and lots of upgradeability.

Mecha Comet is a modular handheld Linux computer that connects to Raspberry Pi Hats and other snap-on modules. It runs on ...

This is not a phone. The Comet by Mecha Systems is a modular, Linux-based handheld computer built for hobbyists, engineers, ...

You can’t actually buy one yet, but the makers of the Mecha Comet plan to launch a Kickstarter crowdfunding campaign soon with Early Bird rewards starting at $159.