HereGPS trackers have a built-in SIM - like your phone - that uses mobile networks to send you location info. All the fees needed to do that are covered within your subscription. That way, you get to enjoy unlimited range worldwide.

You can pick a plan right after you order your tracker. That way, you're ready to go as soon as it arrives.

Yes, you can cancel your subscription at any time. If you cancel after that, your subscription will not be renewed when it runs out.

Yes. Each plan is tied to a single tracker.