Apple Watch® - Dual SIM with an eSIM - Switch Between Plans
Only 1 Verizon mobile number can be activated on an Apple Watch at a time.
You can have 1 Verizon mobile number and 1 from another carrier activated; however, they can't be used simultaneously.
For instructions on switching between mobile numbers, refer to Switch Between Plans.
The steps below apply to the following models:
Apple Watch Series 4
Apple Watch Series 3
Before completing the steps below, ensure:
Your watch is set up with one of the following iPhones running iOS 12.1 or later:
iPhone XS / XS Max
You have a cellular plan set up on both your physical SIM and eSIM.
For info on adding a cellular plan to your eSIM, refer to Add Cellular Plan.