The new Garmin inReach Mini, a powerful two-way satellite communicator, is so small that it fits in the palm of your hand. But it lets you send and receive messages through the Iridium satellite network and it has an emergency SOS function that operates 24/7. Not bad for a device that weighs 3.5 ounces and is 4 inches tall and 2 inches wide. With the inReach Mini, you don’t have to worry about being out of cell range or off the grid, as long as you have a subscription to the worldwide Iridium network. And you can pair it with…