agreed.
can you answer some ?'s
are you rooted?
has this always happened?
how long have you had the handset?
what troubleshooting steps have you done?
battery pull? data profile update from the settings menu?
did you recently do a PRL update?
add or remove any programs just prior to this occurring?
some reading:
http://androidforums.com/htc-evo-3d/361521-streaming-media-tyrrany-sprint-proxies.html
called sprint to make sure your location is not under an issue?
do you get an error message?
can you upload anything else? photos? can you stream something from, say, youtube?