Can I choose Wi-Fi calling as my preferred calling option?

Your phone will try to establish a call using 4G first. If 4G is too weak or unavailable, it will use 3G. If 3G is too weak or unavailable, it will use Wi-Fi Calling.

To make calls over a Wi-Fi connection even with your network mobile coverage available, you have to override your device’s default settings. The settings vary per device.