Hello All, I have an Apple Watch S3 with LTE. I also have a grandfather AT&T data plan. I’m being told by AT&T that it’s not possible to add the $10/month watch data plan to my existing account. I only know of 1 other person that says he/she was able to get that combination to work, but when I tried to walk through the recommended steps with AT&T support I was told that wouldn’t work. So I’m wondering if anyone else has gotten an LTE Series 3 Apple Watch to work with their AT&T Grandfather Data plan.