I was thinking about the setup when I get home. I'm on AT&T and added a line for the S4. Will I need to do anything to disassociate the S3 watch with my phone so it will sync correctly? I hope that makes a little sense.
I removed the s3 from my phone, paired the new s4 and then when it came for the cellular it asked if I wanted to replace another device. I choose that and all setup.