Google Pixel 3 and ATT
On this page https://www.att.com/plans/google-pixel.html AT&T states:
Step 1: Bring your Pixel, keep your number
Bring an unlocked Google Pixel to AT&T. You can buy your Pixel phone from Google or port your Pixel phone number from another carrier to AT&T.
Step 2: Choose your plan
Sign up for a wireless plan that matches your needs or add a line on your existing account.
I'm just looking for clarification -- do I have to get a new plan or add a line to my existing account? All I want to do is purchase a Pixel and use my existing number/account without adding any lines.