https://www.garmin.com/en-US/satellite-communicators/two-way-messaging/
Two-Way Messaging | inReach Satellite Texting | Garmin
When your adventures take you beyond the reach of cell towers, inReach satellite messaging technology can keep you in touch with those who matter most.
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https://embodiaapp.com/guides/269-home-exercise-programs-hep-on-embodia-embodia-team/guide/19651-two-way-messaging-on-the-mobile-app
Two way messaging on the mobile app | Embodia
two way messagingon themobile app