Wi-Fi Calling functionality is currently supported on the following Samsung devices with the latest firmware listed below:

Samsung Flip 3, Fold 3
Samsung Flip 4, Fold 4
Samsung S23, S23+, S23 Ultra
Samsung S22, S22+, S22 Ultra - *LRA network only (EKN tentatively scheduled for December 5th, 2023)
Samsung S21, S21+, S21 Ultra
Samsung A03
Samsung A14
Samsung A32

To activate Wi-Fi Calling for Android/Samsung S23:

Settings > Connections > Wi-Fi Calling > On > Enter Emergency Address

Please note: Appalachian Wireless is required by the FCC to support 911 calls and collect a registered location to enable the service.

Click here for list of devices that support Wi-Fi Calling

https://www.appalachianwireless.com/support/article/which-devices-support-wi-fi-calling.