You’re moving into a home with security alarms
A new home may come with an installed home security system. All the devices work, are hung in the right spaces, and are ready to go. In this case, just turn on the phone to call and start a new contract. A Vivint expert will still come to your home to make sure there are no usability problems, and they might offer options on an upgrade or two. It's a fast trip, and you can get your alarm monitoring set up without having a bill for any new components -- unless you add on.
The old homeowners can move an existing Vivint contract to you for a small transfer cost to make your life easier. If the owners are downsizing to an apartment or retirement community, turning over the security contract might be a condition of the sale.
You are looking to move and bring your home security components with you
You may need to bring your old smart devices with you to a new home when you move. Luckily, it's fairly simple to do, as most smart devices are portable. You can remove each component yourself or call a professional installer to take care of the system. Then an expert will set up the same features -- and any smart devices you want to add -- in the new home. And your home security contract will stay the same.