Here is a list of what the author says are bugs in Jelly Bean on the EVO LTE.
"most of the issues have been Sprint’s."
"There are rumors coming up from the stores than an update is coming soon to fix many of the bugs, but as far as I know there’s no official timeframe on that and that leaves many non-root users out for weeks with buggy equipment"
http://www.pocketabl...evo-4g-lte.html