Cat has just announced a new flagship smartphone, which works with Bullitt Satellite Messenger.
CAT S75 – The world's first satellite phone
Cat’s latest offering, the Cat S75, looks to rival the iPhone in one very specific area: satellite messaging. So in addition to 5G (and 4G, 3G, and 2G) connectivity, it can also connect to satellites to send messages from virtually anywhere, regardless of signal strength or availability.
A built-in MediaTek NTN (non-terrestrial network) chip handles the satellite links for both SOS requests and more typical text messages, processed using Bullitt Satellite Messenger. Those texts can be sent from anywhere in the world, regardless of whether you're in an area with cellular coverage, though there are still situations where a satellite isn't reachable.
While the Cat S75 can send a satellite message to anyone, the recipient must be using the Bullitt Messenger app to view and respond to the message.