The video calling feature is a server-side update so it should be showing on the app already. Users need to have their devices running on Android Kitkat 4.4 or iOS 8 and above to enjoy it though.
Blackberry had first launched the service in North America and parts of Latin America.
Blackberry says the feature has limited availability as its still in the beta phase. The firm hopes to monitor its performance across various platforms and territories, and also gather feedback from users. They also want to “iron out any kinks” first before doing a final, worldwide release in July.