Actually, it will be required to install with a data SIM card inside before switching to a 4G communication network as the pictures of post#14 above!! (one side is SD slot and another side is SIM card slot)
You would need a 4G sim to be inserted into the drone. When in range the drone operates on wifi and it switches to the 4G connection. This means the only limitation on the drone to be able to fly at distance is the battery life and 4G coverage. It's a novel approach for current drones but one that users of the Parrot Disco and LTE module are familiar with.
On the Ai you can fly 22.5km out on a single battery charge