What is the WLAN calling feature on the Lenovo Vibe K5 Plus A6020A46 and how do I use it ?

[normanp]

What is the WLAN calling feature on the Lenovo Vibe K5 Plus A6020A46 and how do I use it to make phone calls? (Note: It's WLAN calling and not WiFi calling). I've enabled it, there's a LAN available, but I still cannot figure how this feature works. Anyone with the same phone have any idea? I attached screenshots below? Thanks.

 

[anon(10614692)]

It's WiFi calling

 

[normanp]

There aren't any options once it's enabled...

 

[hallux]

If you enable the option, connect to a good WiFi network and try to make a call does it use the WiFi or cellular?

WLAN is another way of saying WiFi...