Sony Xperia XZ3

It's not possible to use Wi-Fi calling

If you can't use Wi-Fi calling, there may be several causes of the problem.

It's important to find out if you can use Wi-Fi. If you can't use Wi-Fi, you need to solve this problem first. When the problem is solved, you will most likely also be able to use Wi-Fi calling.

Can you use Wi-Fi?