The ability to put a call on hold and answer another call is built into the default phone apps on Android phones and iPhones.

Though it is an instant messaging app, it also allows us to make audio and video calls. Although Whatsapp has supported on desktop, it has more focused on mobile platforms such as Android and iOS.

WhatsApp, for example, does not give you the option to toggle your mic and camera off until you answer an incoming video call, though that might soon change.

WhatsApp beta version (2.25.7.3 for Android), as pointed out by Android Authority, reveals a countermeasure — one that will give you the option to answer a video call with your camera off.