The $300 GoTenna turns your smartphone into a CB radio, lets you send messages when you have no cell signal!
If you’ve ever had a cell phone, you know how frustrating it can be when your network fails. Areas with little to no signal can be absolutely infuriating, and overcrowded events can be just as bad. To sidestep this problem, the folks at GoTenna have developed their own ad-hoc network for sending messages. It’s an incredible concept, but with an asking price higher than most smartphones, there’s no way that this implementation is going to take off anytime soon.
The GoTenna is essentially a small, low-power (2 watts) radio transceiver. It’s powered by a lithium-ion battery, and it connects to your smartphone or tablet via Bluetooth. The company behind GoTenna is rather vague about the technical specifications of the device, but given the max claimed range (up to 50 miles), it probably transmits on a very low frequency (and probably has very low max bandwidth). GoTenna creates an ad-hoc, encrypted network between any other GoTennas in range. It’s kind of like a smartphone equivalent of a CB radio.
You can connect the GoTenna to any iOS or Android device via Bluetooth. After that, all you have to do is download the GoTenna app and fire off a message to anyone else who might be in range. Depending on your elevation and environment, the signal can travel upwards of 50 miles. By default, only your intended recipient will be able to read your message, but a “shout” feature allows messaging any GoTenna user within range. It doesn’t use cell towers or WiFi at all, so it’ll work even if all other forms of communication are unavailable.
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