We’ve known for a while that RIM plans to replace the BlackBerry Curve 85xx with the BlackBerry Curve 8300 for a while now.
As the pictures reveal, the BlackBerry 9300 adds 3G and 802.11 n Wi-Fi connectivity but is otherwise quite similar to the device it will replace. It also appears it will be powered by BlackBerry OS 5.0 (rather than the new BlackBerry 6) and come with 256MB of memory and the same 320 by 240 display as its predecessor.
There is still no word on availability and pricing but AT&T appears to be in line to offer it.