Agree with the bloatless one. If its warm then there is a chance something is running in the background. If you haven't tried powering it down and pulling the battery for a minute, that would be a relatively painless first step. Listing your apps might work if any of us see something that is a known problem we can better advise you. Otherwise, a factory reset without syncing the apps, and then adding the apps back one at a time very slowly is another way to get to the bottom of a misbehaving app. If you haven't done that yet, now would be a good time to since many users with similar issues have indicated that the reset fixed them... well their phones anyway.
The mighty V may not treat you so well if they ID the update on your phone BTW.