After I numbersync, the phone unsyncs itself.

I've attached two pictures showing numbersync in, then turned off.  All I did was refresh the screen several times and this is the result.  Not sure what else to do, maybe return the watch and just stick to the phone.

“Connect this watch to the ATT network to see if your synced”.  

Looks to me like while the watch is on your account, it’s not connected to cellular.  That makes me suspect the E-sim is not activated.   Back to an ATT store if it can’t be resolved over the phone.

  It would explain both problems.

The watch is connected.  I can make calls and it shows the number assigned to the watch meaning the sync isn't working.  As you can see below, after it's synced, immediately it's changes back.

So what you're saying is, other than the main sign on account, I should create one dedicated to the one line?

YES.   Each line using number sync has to create an user name and password to get it working.

But my scope of knowledge ends at number sync for tablets.  I don’t have a watch.

So you have a login for the accounts and an access id just for that one line?

Please direct me to a link.

Today I went to ATT store and they couldn't fix the problem.  All they did was turn on Bluetooth.  

Came home and tried it on my wife's line and it worked.  Tried to sync the gear s2 on my phone and worked perfectly.  So I switched phones and Sims and it didn't work on mine, only my wife's phone and the gear s2

https://www.att.com/support/article/wireless/KM1209875/

Create your access ID... https://www.att.com/support/article/wireless/KM1008917/

Aloha,

Just wanted to thank both of you for the help. After many times online with AT&T advanced tech team, and after asking them many times to disassociate my line with any of the access id on my account so I can create a dedicated one with the line, finally got it done and now watch is synced with the phone and no more issues..

Again, thanks and Mahalo for the help!

Have a great day!

Jeff