WhatsApp has a new 'Call waiting' feature for Android phones. The new call waiting feature on WhatsApp currently works for version 2.19.352 of the stable release and versions 2.19.357/2.19.358 on beta channels. So you can only get it by updating the WhatsApp app on your Android device.
How to Use WhatsApp – Beginner's Guide
If you receive a second call on WhatsApp while you are already on a call, your phone will ring and you will receive a notification about the second call.
You will then be greeted with two buttons – Decline and End & Accept. Tapping Decline will reject the second call. Pressing End & Accept will end the first call and connect you to the second caller.
RELATED: How to Get Call Waiting Feature on WhatsApp
