[Rich]

On the Verizon extender there are some settings for it (via your Verizon management page) that allow it to be completely 'open', or to give certain cell phone numbers 'priority'. Enter your family cell phone numbers, then set it to give those phones priority access.

By giving those in your home priority, you ensure that they can always use it, as most of these devices are limited to a certain number of phones using it at one time.