No it doesn't but you can get a new device from tMobile for $60. The pay back is pretty quick. In addition, from what I can determine, tMobile doesn't charge startup charges like Millenicom. My only beef with Millenicom is that it isn't good if you only want service from time to time for backup. Specifically anytime you stop service you have to return the modem and then pay another sign up fee to restart the service.
The verizon hotspot plan may be more what you're looking for then. It's good for occasional backup as you buy the device and service can be stopped at any time. There is a small reconnection fee but not much.