I ordered the APPLE watch 6 Cellular, do I need to all my carrier AT&T to set up

I’m not positive about ATT since I use Verizon. My Apple Watch app set up the connection directly with Verizon within the app. That of course was after Verizon finally added the Series 6 Apple Watch to their Database.

I didn't have to call AT&T to set up my Series 3, just followed the directions in the Watch app.

This will be my 3rd, scheduled for October 14th - 21st. If it gets here two days late it can be a birthday present.

I just got my first one on Friday. The Apple Store had then one I wanted in stock. Enjoy you watch when you get it. 😃