Nebpor - You are in the general license to use a mobile on the ground - static caravan, in a car, etc. Receiving isn't an issue, but transmitting is.
You are not in the general license to transmit from an aircraft (you can receive), and you want to transmit legally then you need a specific license.
We did look at this for real-time video 4G downlink from a helicopter in the UK. We started with the expectation that you have, "it's just a phone, so must be OK", and found it to be a complete nightmare. Eventually we went with "record to data card, land and hand-over the data card".
Enjoy the caravan