150KM range at sea

[Rexymav]

You left out the most important factor and that is the height of antennas on each end. Checkout this post I did and keep in mind the cell tower was at 2,000 ft and above our height:

Extreme range BR1

Thought some of you might be interested in this busman’s holiday science project in way northern Maine last summer. When there’s no cell data and limited voice where you are going then sometimes you need to plan ahead and take extreme measures. Dual phased array log periodic antennas plus a BR1 mounted on a tripod for accurate aiming with an old BMW motorcycle battery and a solar panel!  This little creation provided solid data (6Mbps down, 3Mbps up) to a cell site 20 miles away. That ridge i…