I looked at those texting devices but for me the Sat phone option was way better. Second hand off E bay for 500 bucks and when I need to use it I just put my I phone sim card in. No monthly costs. The calls are at international rates but when you need it who cares. Can also lend it out and any teltra sim can go in it and the owner gets billed. The text device I looked at still had sign up and monthly fees.