A method and system are disclosed for connecting a device to subscriptions and cellular billing plans of separate users and for managing the concurrent use of the device by the separate users. A computer-implemented method comprises enrolling a device in a cellular subscription and billing plan of a user. The enrollment includes providing an identifier for the device to a cellular subscription, effectively adding the device to the cellular subscription and billing plan selected by the user. The method and system allows the user to use capabilities of the device as governed by the cellular subscription and an associated billing plan as selected by that user, while the device is also available for use by another user via another cellular billing plan, as selected by that user.