Whatsapp is rolling outa new calling interface for Android users.
The instant messaging app is working on the voice call interface since December 2021.
However, the redesigned voice call interface is now available for selected Android beta testers.

Whatsapp has designed the interface for both iOS and Android apps, but now its only available for one.
Whatsapp will bring an entirely new design for group calls and a revamped caller interface for individual calls.
WabetaInfo has shared a screenshot that shows the changes.

When a group voice call is made, it brings voice waveforms for all the participants.
However, the customization option is not yet available.
Also, you might download the beta app APK.

