Connect air unit to 4G modem

[Alvin]

You may have a look at the following topic:

Herelink communication 4G

Hello, I am working on a Rover project and I am looking for a 4G communication solution. Today, the solutions I have found require going through a proprietary server. Would it be possible to have a solution that would use two SIM cards, one in the ground station and one in the Air Unit (like a telephone conversation between two GSM), which would no longer be dependent on an external service provider?