After the Tango update for At&t's Lumia 900 has been spotted on Nokia Servers waiting to be deployed to its 300,000 Lumia 900 users, the guys at WPCentral flashed the ROM on Lumia 900 to give us a chance to see what's coming...
The major changes/additions are that the LED lights on the front touch buttons now stay on when the screen is on, this has been one of my main annoyances.
Contact Share and Counters features are also available with the update.
Also attaching multiple pics/videos and voice notes to your MMS messages is now possible!
And overall Improvements to the phone are also available.