Does the SOS button work without a data plan?No, to use the SOS function you must have a data plan to access the satellite network. Make sure your device is active before your adventure. You cannont activate a data plan via satellite in the backcountry.
How to Send an SOSIn the case where you need to get in contact with emergency services, you can use the SOS feature. This service is available world wide. SOS on the Bivy APP (recommended) Click SOS on the Menu screen. (Don't worry, there are many warnings to make sure you do not accidentally activate an SOS call.) To confirm the SOS, you have to type the letters S O S and push send.