Bell Mobility is rolling out the GDR2 update to their Samsung ATIV S Windows Phone. A leaked internal document from the Canadian wireless provider notes the update will improve battery life, add Data Sense, improve the camera and photo viewer, as well as improvements to the Maps application, SMS and Bluetooth performance.
If you are a Bell Mobility customer sporting the ATIV S, you should see the update notification by August 5th. Not sure if you can use the "check for updates" feature in the Settings and see it sooner but it's worth a try.
If you're a Bell user with the Samsung ATIV S, let us know below in the comments if your seeing the GDR2 update.