When a scanner has been successfully been enrolled onto MobiControl a Lockdown is applied to them by default that limits the users access to the device to only being able to launch the MobileWMS.
The lockdown can be modified to include links to launch other apps or to launch the on device browser to access web-resources
Examples on that can be found here:
https://taskletfactory.atlassian.net/wiki/x/YrS0B
And if you need to access settings or other apps then those on the lockdown then you can unlock the devices following this guide: