I just got back from a hike in the mountains where there was no cellphone signal and goTeleb worked great! The messaging function worked exactly as described and the GPS provided accurate location data. The goTele team has set itself the task of revolutionizing the market with its product. I had some initial questions and concerns but the goTele team responded within 24 hours and all issues were resolved. I have a Moto Z Force with an extra battery, but since there was no cellular connection, the battery usage was actually very low, at around 60% after about 5 hours of hiking and another 3 hours of regular use. You can use one goTele device alone and just add yourself to your own group, but it works even better if you have two devices and join them. same group. Be sure to read the documentation beforehand and experiment a little. Also, make sure you have previously downloaded maps of the area you will be hiking in.
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