You can only commission the device via a Bullit plan, which registers the eSIM (of the Motorola Defy) for the satellite. This is not an eSIM for mobile phones. Satellite reception works well in Switzerland, but a clear view to the south is required (geostationary).

The device does not need its own SIM, standalone functions are emergency call and position report, for text messages (registered) mobile must be paired via Bluetooth, for the latter regardless of whether SIM or eSIM