- Push notifications: get alerts for new messages and calls even when
  the app is closed
- Incoming calls now ring full-screen on the lock screen, like a
  regular phone call
- Share your screen during a call
- Send files in chat — documents, PDFs, videos and more, up to 25MB
- Fixed accepting friend requests
- Fixed a blank loading screen in a brand-new chat
- New app icon and refreshed launch screen