Later WhatsApp users will be able to create a hidden group (Hidden Group). This group can only be seen and searched by those who are members or have received an invitation from the owner. This feature was discovered by WABetaInfo in the application version 2.24.9.20 which is currently in beta testing.
These hidden groups may be used for the purpose of creating undetectable groups. For example to discuss a secret company project or create a union in the office without it being seen by the employer. As with all beta features on WhatsApp, it is not yet known when this feature will be rolled out to all users.
At the same time WhatsApp is also testing the feature of making voice calls in the application to users whose numbers are not saved. The "dialer" screen for making voice calls is also found in the application version 2.24.9.28 which is also in the beta stage. After this WhatsApp voice calls can be made without having to save the number first.