E838: License Free Off-Grid Comms Options for Smartphones, Text and GPS Sharing

I've come across some options for using your Smarphone Off-Grid over license-free frequencies and equipment, allowing messaging and GPS location sharing. These systems are not for Ham Radio, but for anyone, and can be used anywhere. Let's talk about these 3 options I have found and how they work.

BTWR Starter Kit: http://hr2.li/zpga8

Links to devices in this stream:
Motorola T800: http://hr2.li/8cdmh
Power Talkie: http://hr2.li/mm57b
Beartooth: http://hr2.li/ffcoe

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