I've just tried restarting, then turning off and back on; no joy. Tapping the button in quick settings gets the tap acknowlegment but no colour change. In settings there's a Mobile data is off prompt; tapping turn on makes it disappear for a few seconds, when it returns. I've emailled hello@planetcom.co.uk to ask about it; it would probably help if others with the same problem did the same.
Sorted now. Switch the phone off, pop the SIM out, switch the phone on, switch the phone off, pop the SIM back in, switch the phone on. Let your Cosmo pick up the settings from the 'new' SIM.
Rosie
Boom, sorted. Many thanks Rosie.
Now to the second part of the puzzle, arguably more of my own making: having backed up to Google Drive via Settings - System - Backup, how do I restore? The Cosmo's new startup procedure doesn't seem to have ask to restore a backup.
I'm in a precisely similar situation as Tom. Made the mistake of installing Cosmo firmware v20 and v21, backed all my Cosmo data up to Google Drive, and solved the Mobile Data issues using the above Rosie advice. Now facing a major hurdle: Cosmo has no "Restore" button (device specific) so my Cosmo is more or less bricked. This is apart from the missing Android security updates and the (very) buggy PC apps (both in my Gemini and Cosmo). Not mentioning a dead CoDi, buggy voice assistant, and LEDison.
The flashy introduction of the new Astro now seems in stark contrast to the lack in support (Cosmo) or even abandoning (Gemini) of earlier devices.
PC, pls address these justified comments.