Looking at trying out a new device developed by Beam Communication, an Australian public company specialised in GPS/Satellite communication.
It's called Zoleo, a device that not only can send out SOS emergency signal, but also provide a 2-way text messaging capability! That will make my travel and safer so much easier than ever. I used SPOT3 in the past, it was great but lacking the messaging capability so it's a "guess" whatever check-in/custom message is sent by the recepient.
It's a new product on the market, looking forward to seeing how it stacks up.