The smartphone has an SOS satellite emergency call function, which can be tested via a demo. According to the manufacturer, it requires ‘only’ a clear view of the sky. Information online states that geostationary satellites (GEO), which are always positioned at the same point in the sky near the equator, must always be aimed south-east from Switzerland. But what if a mountain or a house is in the way? Could someone stand behind a north-west-facing wall of a house and run the demo? It would be very important for me to know, as a hiker.