I'm not certain that Odille said she couldn't get SOS. You can get SOS on mobiles irrespective of the network you are on as it will use other networks as well. It's worth checking as it will often work, and it is a better option than an epirb. My mobile rarely works near home, but I can usually get SOS - not that I've dialled it, it just says I can. I wonder if there's a way of testing it without annoying the operators?