Can't say that it's anything new, but AT&T has re-released the "new and improved" version of OS 4.6.0.297 after pulling it earlier in the month due to call quality issues. Those that downloaded 4.6.0.297 prior to it being pulled may want to re-install it, as it appears that the Software Platform has changed from 4.0.0.243 to 4.0.0.247 (as seen in the picture above). New features such as Visual Voicemail are back, and call quality is said to be "improved."
Those that opt to download the new OS, please let us know what you think via the comments section! OS 4.6.0.297 can be downloaded here.
Source: Crackberry