The Smartphone version of Cingular’s AKU2 update for the Cingular 2125 is available for download. If you’re interested, you can pick it up here.
To check to see if your phone needs the update, compare its System Properties page with the one below. If your version numbers are lower, then you need to update your phone to get all of the enhancements.
I’ve pulled it down, but have yet to install it on my wife’s phone. I’m having one heck of a time getting features and functionality to activate properly on this device. I’m hoping that it’s either on Cingular’s end, or the update will fix it.