Throughout some of our trips we've been in some isolated areas with no cell service, wifi or other means of communication. Recently, we saw a handheld device that uses satellites for two way text communications and decided to give a try, mostly for potential emergencies. It's a Delorme Inreach (model SE) and costs about $250, plus service subscription. The plans range from about $14/mo to $100/mo depending on features.
Our unit works as advertised and purportedly has 100% global coverage. It even worked in the house.
It has an SOS button which sends a verified message directly to Search and Rescue, syncs with your mobile devices, sends messages to multiple email addresses or phone numbers, allows others to 'ping' your location, has a trip mapping feature, topographic map capability and optional route guidance.
When we are on the road we usually blog daily and if family or friends don't see the blog posting they tend to get a bit concerned. This device would allow us to send out a message to them all at once saying that we are out of cell/wifi service range.
For us it looks like it will be worth it for the peace of mind of the SOS feature. Thought others might want to know that such a device is out there....especially all you hikers.
- Mike