Which LTE (4G) antenna to choose for a router?

Question

Antenna

Good afternoon! Help me choose an external antenna kit for the Megafon R100-2 router (aka Huawei B593). It is necessary to work in the LTE network of Megafon, the distance from the base station is 7 km. Out of city.
So far from what I found (not advertising):
External panel antenna AX-2520P MIMO 2x2
AX-2520PF MIMO 2x2 4G / LTE antenna (20dBi)
AGATA MIMO 2x2 - broadband panel antenna 4G / 3G / 2G (15-17 dBi)
One Russian manufacturer, I wrote them the same question - they stubbornly ignore it, they have such a loyal attitude towards customers .....
The piece of iron is not cheap, I don’t want to make a choice.
Ideally, you want to catch 4G, in the most extreme case, at least 3G.

Answer 1

Because on this resource there were no competent, in this matter, people willing to help, it was decided to take the AGATA MIMO 2x2 antenna.

Answer 2

AX-2520PF MIMO 2x2 4G/LTE antenna (20dBi) should work.
But if there is a direct line of sight to the BS, I would recommend a parabolic antenna, for example this one:
A parabola will have a gain of 24-27 dBi.