How to catch and amplify the 3G / 4G (Internet) signal while on the move (in the car) and at a great distance from the tower itself?

Question

mobile connection

The task is to catch / amplify the signal of the cell tower - both for reception and for return, while in the car, while constantly moving and being at a great distance (tens of kilometers) from the cell tower.

Answer 1

Now, with your additions, you can write the answer.
The problem with power is solved by repeaters (repeaters and signal amplifiers). Choose one that accepts 12-volt power.
With a directional antenna, things are trickier. The correct antenna for your case should not be directed in azimuth, but directed in a plane perpendicular to the ground. its radiation pattern should be pancake-shaped. The thinner this "pancake", the higher the antenna gain and the higher the range (by the way, the antenna gain is more important than the transmitter power, since the antenna amplifies the signal not only for the transmitter, but also for the receiver). There are such antennas, here is one of them. She has a coefficient. gain 9 dB, this is 8 times the power (every 3 dB is a double gain). It is necessary to install such an antenna as strictly as possible vertically so that the "pancake" of radiation is directed to the horizon, and not to the sky and not to the ground.
Well, what range you get on this equipment - this test will show.

Answer 2

directional antenna