“Motorola’s messaging service works just like SMS, but it can only be delivered to other people running the special Bullitt Satellite Messenger app. The service will do SMS forwarding, though, so if you punch in a random number, that person will receive a message prompting them to download the Bullitt app so they can talk to you. It’s probably best to set this up with someone beforehand, but it sounds like a great way to communicate when you’re off the grid.”