IMPORTANT: You must open Google Voice at least once after upgrading to route calls.
* Asynchronous SMS sending (offline queuing) – Note that it still works synchronously for multiple recipients.
* New style UI in Honeycomb and ICS
* Official user feedback menu on each screen (previously dogfood menu).
What’s in this version:
Now integrated with Android 4.0 visual voicemail.
Direct access to folders from the inbox in Android 4.0.
Sources and More: