Countless radio issues ranging from the device getting stuck in 'No Service' mode to a large amount of dropped calls. Also a lot of software issues such as the phone getting stuck in a soft reset loop, just soft resetting occasionally, hard resetting due to fatal memory errors, etc.

I was going to post the link to the updater but it looks like someone beat me to it. Definitely update your device. Eric, my roommate who works for WDS Global and does VZW Data tech support says it fixes and in turn prevents a HUGE number of the issues.