Wi-Fi Calling settings don't transfer after switching devices and/or performing a factory data reset. You need to enable W-Fi Calling manually if you want to use it.
If powered off, press and hold the Power button until the Samsung Galaxy S6 edge + screen appears then release.
From the Welcome screen, select the appropriate language then tap NEXT.
From the Phone Activation screen, tap NEXT.
If prompted, enter the last 4 digits of the Account Owner's Social Security Number or the Billing Password.
If activating a new phone, ensure the old phone is powered off and allow several minutes for the deactivation of the old phone to complete.
From the Add your account screen, tap SKIP > SKIP.
From the Google services screen, select any of the following to turn on of off then tap NEXT.
Use Google's location service to help apps
Improve location accuracy
Help improve your Android experience
From the Name screen, enter the first and last name then tap NEXT.
From the Protect your phone screen, select No, thank you then tap SKIP > SKIP ANYWAY.
If presented with the Verizon Cloud screen, tap SKIP > NOT NOW (lower-left).
From the Email setup screen, tap SKIP (lower-right).
From the Summary screen, tap DONE (lower-right).
If presented with the Samsung account screen, sign in with the account used on a previous Samsung device then tap SIGN IN or tap CREATE ACCOUNT.