GL-X750, switch off LTE Sim?

I’ve a SIM 50GB Data which i only must pay, once a month, if it is activated.
It looks like, if a SIM is inserted , it is always activated?
So i must put in my SIM only if needed?

You can abort the cellular connection when you don’t want use it. You need to access to the web panel and click the ‘Abort’ like below image.

Thanx, but if i had to abort the connection, there is a connection and i had to pay for this month