According to the report by aggiornamentilumia.it which revealed that WhatsApp beta’s upcoming update for Windows Phone will come with a new call icon. This is in continuation of various UI changes that were introduced by WhatsApp in last official app update.
Also in the upcoming update, there will be an option for users to listen to the voice notes in the call mode. This update will also feature various bug fixes which will make the application a bit faster. It looks that Whatsapp team is working hard on the app and seems like making it even better in future versions.