Bruce, start with a soft reset. Next, when you type in an internet address (e.g., Google) will PIE take you there? Are you storing your temp internet files on your storage card? If so, reconfigure your device so that the temp files are stored on your device. Use MemMaid or SKTools also to clean up all the files, cookies, etc.
You didn't make any changes to your Connections (under settings)? To check, go to Connections and click on "Manage existing connection". The Power Vision radio button should be checked. The number associated with it should be #777.
Next tap on Edit. The entries should say "Power Vision" and "Celluar Line".
Tap on Next. This entry should say "#777".
Tap on Next. You should have a user name in the first box. Something like,
xxx@sprintpcs.com. Don't make any changes to your password. Domain box should be empty.
Tap finish and x out.
Let us know what happens.
late,
Coz