WhatsApp has released a new update for its beta program on Android and iOS, bringing a new feature for unknown contacts in group chats. The update for Android, version 2.23.5.12, introduces a push name that replaces the phone number of unknown contacts within the chat list, making it easier to identify who they are without having to save the number as a new contact. This feature is also available for some iOS beta testers after installing the WhatsApp beta for iOS 23.5.0.73 update. However, it is important to note that this does not hide the phone number for group members as it is still visible within the chat bubble. The feature is currently being rolled out to beta testers and is expected to be released to more users in the coming days.