You moved into a home with an existing security system
Sometimes when people purchase a house, a modern security system is already in use. All the alarms and cameras work, are hung in the best places, and are ready to go. In this instance, you might see that you have to call and establish a new contract. A Vivint expert will still show up to make sure there are no integration problems, and they might offer suggestions on an upgrade or two. It's a quick trip, and you can have your 24/7 monitoring set up without worrying about any new components -- unless you make additions.
The previous owners can transfer an existing Vivint contract to you for a small set-up fee to make the transfer a snap. If the previous owners are moving to a condo or retirement community, turning over the security contract might be a condition of the sale.
You need to move and bring your home security devices with you
You might want to bring your old smart devices with you to your new place when you move. Luckily, it's fairly easy to transfer, as many components are wireless. You can uninstall each device yourself or call a professional installer to dismantle the system. Then an expert will put in the same devices -- and any additions you want to have -- in your new house. And your home security contract will keep the same.