Restricting unsupervised 

iOS

 devices 

For devices that are enrolled in DEP, you can assign an enrollment configuration to devices that has the "Enable supervised mode" setting selected. When devices are activated, they are automatically activated in supervised mode. For more information, see Assign an enrollment configuration to iOS devices.

You can assign an activation profile that has the "Do not allow unsupervised devices to activate" setting selected to user accounts. This setting is supported for the "MDM controls" and "User privacy" (with SIM-based licensing enabled) activation types. 

BlackBerry UEM

 prevents unsupervised devices from activating and automatically removes devices if they become unsupervised, whether the devices are activated with the 

BlackBerry UEM Client

 or using DEP. For more information, see Create an activation profile.