Short story: goTenna is a small device that allows you to use your smartphone to send and receive messages and share your GPS location with others even when you don’t have service.
Longer story: goTenna is a small, rugged device designed to make “No Service” no problem. Just pair your smartphone with a goTenna and communicate off-grid with those near you who also have goTenna, anywhere on the planet, regardless of access to cell reception, wi-fi or even satellites. goTenna allows you to send and receive texts and share GPS locations on offline maps, without ever relying on centralized connectivity. Depend on it in all kinds of situations: when hiking in remote areas, traveling, attending music or sporting events or during an emergency. Plus, because goTenna is end-to-end encrypted, it’s not just for when you’re off-grid, but when you want to be.