Which modems can be used to organize point-to-point communication using 4G / 5G /LTE technologies without the participation of an operator?

Question

Wireless technologies

Tell me, on what equipment can I assemble such a link?
It is quite possible that your base station is nearby
. I would like to find a suitable modem for deploying a local access network.

Answer 1

None.

It is possible that your base station is nearby

If you mean some kind of femto cell, then this will not help at all.
Use Wi-Fi point to point (actually a bridge).

Answer 2

On any, but for this you will have to become an operator yourself)
SIM cards are not a problem, they can also be taken here:
shop.sysmocom.de/products/sysmoISIM-SJA2 The
base station can be taken on the secondary, the core can be taken crooked, but free , like https://github.com/open5gs/open5gs
But what to do so that the State Commission on Radio Frequencies does not take you for a sensitive place is a question ...
Apparently, lock yourself in an iron hangar so that the signal does not break out and unscrew the power of the base stations to a minimum.