New Features
- Software stability
- Improved battery life
Improvements
- Improvements to Trace dictionary
- Improvements to screen responsiveness
- Improvements to video playback
- Improvements regarding device reboot / power off
- Improvements to icon pixilation
- Improvements to Wi-Fi connection
- Improvements to screen/photo resolution
As with all carrier OTA’s, it will roll out over time and should be to all devices by September 18th. You can always attempt to force it through by heading into the settings – About phone  – Software updates and furiously tapping “Check now”
Source: TmoNews