Yes, this is a 2.3.340 ROM Now - that being said - I'm not sure how this will work for those of you still on 2.3.15 ... since I already flashed 2.3.340 to my X it is impossible for me to know. However - this ROM does update the kernel, the radio, and the bootloader to most recent. Just not sure if/how this will work for those on older versions. So - keep this in mind if you decide to flash. I've reflashed over my 2.3.340 several times with no issues. Also - this ROM updates ALL apk's and libs to 2.3.340. Not tooo much new really, as I've been so busy. But wanted to get a new version out with updated apps, etc.