U Mobile WiFi Calling launched in Malaysia for iPhone, Android coming soon

U Mobile WiFi calling service has been launched today, the first in Malaysia. With the new service, customers will be able to make and receive voice calls over a personal or public WiFi connection.

Here's how you can enable WiFi calling services

Under Setting, select Phone, 

Select Wi-Fi Calling (refer below screenshot)

Slide the Wi-Fi Calling on This iPhone (refer below)