The Cosmo Communicator is what you’d get if you crossed a smartphone with a pocket-sized laptop computer. Unfolded it looks like a tiny laptop with a keyboard inspired by the design of the classic Psion Revo PDA. Fold it and you’ve got a smaller cover screen that you can use for phone calls, notifications, or other simple tasks.

Aside from the clamshell design, the phone has another unusual feature: it typically ships with Android, but can also support alternate operating systems including Debian Linux and Sailfish OS.

Developed by Planet Computers, the Cosmo Communicator went up for pre-order through a crowdfunding campaign in late 2018 and began shipping to backers in mid-2019. Now Planet Computers has announced an update for the Debian Linux software that runs on its phone, bringing support for a bunch of new cover screen features.

The update should be available soon from the Planet Computer support page and, among other things, it will let users do the following things without opening the device:

  • Make and receive phone calls
  • Switch a call to the speaker
  • View the call history log

There’s also support for making calls from the larger primary display when the Cosmo Communicator is open.

And when the device is open, you can use the cover display as a trackpad for scrolling or moving an on-screen cursor by touching, tapping, and swiping the cover display while you’re looking at the primary screen.

The Cosmo Communicator is available from Planet Computers for £601 ($785), but the company says customers who use the coupon LINUXPHONE at checkout when ordering a dual-boot phone with Android and Linux will save £100 ($130) on a phone that will ship in November.

But if you don’t already have one, you might want to read through the comments on Indiegogo before pulling out your wallet. Owners have a bunch of complaints about bugs affecting Android and Linux performance.


At we strive to provide timely news, opinion, and how-to articles related to the Linux phone space. But it takes time and money to keep this site alive, and while advertising is our primary source of revenue, there are several other ways you can help support this website, even if you're using an ad blocker.*

Contribute to our Patreon campaign


Contribute via PayPal

* If you are using an ad blocker like uBlock Origin and seeing a pop-up message at the bottom of the screen, thisguide that may help you disable it.

Join the Conversation

1 Comment

  1. Planet put out this “update” solely to encourage articles like this of which there are a few.

    Here we are 10+ days later and the promised update is nowhere to be found.

Leave a comment

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.