-Recall the last message you send within two minutes
-Select multiple photos and send them in chats
-Open WeChat or enable WeChat functions via Voice Assistant Cortana
•Added the ability to control the app using Cortana voice commands.
•Improvements to the user experience per feedback from our users.
•Fix for a crash.
The Lumia native Extras+info app has also been updated but only general fixes and improvements is mentioned as the changelog.