Is there a way to enable/disable mobile data?

[Gowtham_Angamut]

I would like to know if there is a way to keep the mobile data always on / turned off, as we are receiving requests from our customers stating "the users should never turn off their mobile data". They want their user's device to be connected with MDM all the time. 

[Moombas]

Hi, there must be something (at least for COBO and COPE) for Wifi but haven't seen that for mobile data yet (in our MDM).

But you may take a look in the relevant OEM config apps if the manufacturers provide such functnionality there.
Example from Lenovo OEM config app: