"Thanks to the recent version of WhatsApp beta for Android, we discovered that WhatsApp is developing a new feature that allows users to silence calls from unknown numbers while still showing them in the calls list and notification center, for a future update of the app," reports WaBetaInfo.

"This feature has several advantages, such as reducing interruptions and potentially avoiding spam calls," the website reported.

The feature has not been released for beta testers so far.

The facility will be available during a future update of the app.

"The toggle will be located in the app settings and, once enabled, calls from unknown numbers are always silenced, but they will still be shown in the calls list and notification center," the website said.

"This new feature may also help users reduce spam calls significantly: in recent years, spam calls have become a growing problem with scammers and their unsolicited calls, and instant messaging apps are no exception. In this regard, we also shared a poll on Twitter asking users if they had ever received a spam call on WhatsApp to get an estimate of the prevalence of this issue," read the website.