settings>system updates>htc software update
Between all the XDA threads and website articles like this Did Sprint's October 31st Network Updates Turn Out To Be Real? We're Seeing Massive Improvements In 3G Speeds In Some Areas - How About You? it seems like many are seeing massive data speed inprovements with this.
I had automatic updates turned off because I'm rooted and still got the update. Very odd indeed. I did notice that today when I took my son to the University of Kentucky for a campus visit we never lost service. Used Navigation the whole trip. Btw... My son very well may become a Wildcat