WhatsApp Beta for Windows Phone has updated yet again. And it again brings some UI changes like the last update. In fact the latest update makes the changes brought by the last update complete. Last update changed places of the icons at the bottom but made call button hard to discover and prone to accidental use. This update sends the Call button to top as can be seen in the above screenshot.
There is one more new change apart from the call button moving to top. Profile icon has now appeared on the top adjacent to the call button.
Thanks Nawzil for the screenshot.