There will be occasions where you may prefer to move from a chat to a phone call.
This can be done quickly, without even leaving the chat.
To do this click the three vertical dots icon in the top right hand corner of the screen
From here, you will be presented with more chat options.
In order to start a phone call, simply click the phone icon.
The chat will now escalate to a phone call.
You will now be presented with a number of options in the call menu.
Should you decide this call would be better suited as a video call, tap on the right arrow to move across to the option for video.
Tap on the video icon and the internal call will now escalate to video.
Continue your call with your colleague and hang up when finished.