schedule power on/off modem GL-X3000

Good morning, everyone,
I have purchased for commercial use a pair of GL-X3000, right now they are in production at customers and they are working quite well, great job guys!

However, I would need a function that I have not found, that is I need to turn off the cellular connection via internal modem from 8pm to 7am. in the task section only the wifi and led settings are found, could you help me regarding this request ?
This is because operators in Italy don't like you to use sims on third-party routers and can create unpleasant connection downgrades or disconnection. So turning off the sim resets the uptime of the sim and maybe , just maybe the connection is not detected as persistent.

Thanks again for your attention.

Does a timed restart help?