Here's a quick fix, at least it worked for me.

I installed the MRX sprint provisioning cab, soft reset, and net still wasnt working.

In settings tab of tf2.5, open wireless controls then hit data connection. in connections, hit advanced, select networks, select data network in the first dropdown, then hit edit. under modem tab, select edit and verify all settings are right. for sprint just dial #777 no user/pass needed. under proxy tab, tick the does connect to internet box. then, x out of all and try data, it should work now.

edit: I am also having a problem opening any emails in poutlook. i use my gmail acct synced over imap and every time i select an email it marks as read but doesnt open to view...weird indeed.