Like Teacher, I consider an InReach like insurrance.

I have an InReach Mini and had a Delorme InReach before that. Upgraded just for the reduced size and ability to construct texts on the unit incase my phone was out of commission.

Satillite messaging is slow and not for normal chatting, but it is a great backup. I have taken it with me when canyoneering, but have not tested it in a canyon. The ones I have done are really narrow (touch both walls) and I would expect I wound need to be in a more open area for signal to get out on any device.