Anyone using this?
Sounds useful, especially where mobile coverage is not that good (like in certain parts of my apartment).
I've tried to enable it, called my own other number (Skype), and received a busy tone, while I could call the same number with the Wi-Fi calling disabled. Could be related to the type of number, but this doesn't give me a lot of confidence to use it.
If I am not mistaken then the Skype numbers in HK are even provided by HGC, which makes this busy tone even worse (3=HGC).