WhatsApp is introducing a new in-app call dialer that allows users to dial numbers directly from the chat application, eliminating the need to switch to the system dialer. The feature includes a floating button for direct communication with unknown contacts without saving their numbers. The in-app call dialer is currently being rolled out to select Android beta users through version 2.24.26.11. A new "Call a number" feature on the contacts page aims to reduce clutter and improve user experience. Users can enter a phone number in the in-app dialer, which will initiate a verification process before making the call. This feature is still in beta testing but is expected to be available to a wider audience soon.