I have just moved 2 o2 I have a galaxy note 20 ultra and galaxy watch 3, I have paid for the £5 extra watch connection, but it does not work when away from my phone. It looks like the pay plan is on the watch, but when the phone is away from it, it looks for bluetooth. Could I have been given the wrong esim?
Do you have 4g calling enabled on your phone account and switched on in the phone settings.
Also calls on other devices needs to be enabled.