According to a report in the Independent, if you are in the middle of a WhatsApp voice call and want to switch to a video call, you just need to tap that button to make the switch.
Tapping the button will send a request to the person on the other side, asking if he or she wants to switch from voice to video.
If the offer is accepted, the call will be switched. If the offer is declined, the voice call will continue as normal. In the current version of WhatsApp, you need to end a voice call to make a video call.
Last month, WABetaInfo reported that WhatsApp mistakenly rolled out the ‘Reply Privately’ feature in a beta update that would allow users to privately send a message to a participant in a group without anyone else knowing about it.
The feature appeared and was subsequently dropped from the beta version of the app, watcher of the popular chat app @WABetaInfo said, confirming that the developers wrongly enabled the feature.
WABetaInfo also leaked the details of the features that WhatsApp was developing for web and desktop, including tap to unblock and a picture-in-picture (PIP) mode.