If you have a iPhone XR, iPhone XS, or iPhone XS Max, you can now add service on the eSIM (for a Dual Sim Dual Standby device) from the App. This lets you have two lines of service on the same device. It's really great if you travel internationally. Its also great if you want a business and personal line on the same device.
You can download My Verizon from the App Store for free.