Thats not a big problem hears what you do
Press the home key and go to main.
Press Settings
Go to General
and then at the botton on the list it should be the third to last it will say Update Data Profile click on that and wait about 30 seconds and this should solve your problem
That worked for me the first time. Later I started having problems with everything. My Web browsing started working, but nothing else. (aside from the phone, which worked well).
Anyway, I called sprint line, and they had me go into data programming, and do a restore. It's not a reset, it didn't mess up any of my stuff. They have to give you a code to do the restore though.
Anyway, They also told me that they experienced a bug work around. If some of your other data services aren't working, log onto the web, and load ANY page, then bounce out and try you AP. Basically the web browser gets you connected to the network, and clears a path for the AP.
*shrug*
Anyway, just throughing in a few more tips, I've had a lot of problems with this phone.
Anyway. .