According to the official sources, WhatsApp is currently working on a new feature known as Flash Calls in WhatsApp beta for the Android 22.214.171.124 updates. The development of this feature is under process.
By using this automatic verification method, the WhatsApp will call on your phone number and then just automatically ends up the call as this will be done for verifying that the last phone number mentioned in your phone’s log is right equal to the number that will give you a 6-digit code.
Moreover, this phone number will always be different, so that there is no way to just trick this method while ensuring you a safe experience with privacy.
WhatsApp is now developing this feature for Android and working on introducing the feature in order to explain by giving an introduction as why this needs the permission of user to make as well as manage calls and also access to your phone’s log.