Currently, if you want to call someone on WhatsApp, you have to save the target person as a contact first. But WABetaInfo, a site that specialises in discovering upcoming WhatsApp features, has discovered an exciting change in Beta 2.24.9.28 for Android: the ability to call any phone number – not just those saved as a contact. So, what will this look like? According to WABetaInfo, it’ll take the form of a simple dialler screen, just like you’ll find in your regular Phone app. As the screenshot below shows, it consists of the usual set of numbers and a green button to start the call. WABetaInfo…