Bluetooth off-grid communication

Both of these accessories allow you to communicate (text, call) with another cell phone without a cell plan within a range of a few miles. Perfect for traveling. Gotenna claims a range of 3 miles, Beartooth claims 10 miles. Beartooth includes topographic maps too. 

https://www.gotenna.com/?gclid=Cj0KEQjwhpnGBRDKpY-My9rdutABEiQAWNcslMBDklowQopW55WtNbpW5LLi7e1J_ypmmhCJPg71LlIaAnoT8P8HAQ

https://www.beartooth.com/?gclid=Cj0KEQjwhpnGBRDKpY-My9rdutABEiQAWNcslOKeWXhH8-dqVo5bSMUiN3nG37cN-udccGMSsljyYnwaAvNi8P8HAQ