As long as you have an active account with your chosen carrier, you should be able to just swipe down the upper menu bar and then tap on the mobile data icon to Enable/Disable it. (... If you're not sure which of those quick launch icons is the mobile data icon, swipe down twice and the same icons should show up with their respective name identifiers).
Or to do the same thing, that involves more steps on your part, is go into the Settings menu and enable/disable mobile data from there.
User Manual for your model:
Visit the customer support page to view user guides, FAQs, bluetooth pairing, software downloads, drivers, tutorials and to get repair and contact us information.[[ANSWERSUMMARY]]
en-emea.support.motorola.com