The "phone as modem" and "sprintpcs" connection are the same config in the network connections, the thing worry about (and dont worry if your not getting an error msg UNLESS you have PAM incl in your plan) is the reg entry that enables the Phone as Modem NAI - which is supposed to be triggered if that connection is selected, and if you dont have Phone as modem incl in your plan, you'll get error 67
Sounds like somehow the connection for "sprintpcs" got deleted
or somehow the phone as modem got set as the default connection, if deleted you can rebuild that connection. just goto start -> settings -> connections -> connections -> From there you should see "Add a new modem connection" -> Name = sprintpcs (or whatever you want, really it doesn't matter) -> Cellular Line -> #777 -> Leave username, password, and domain blank -> Finish
Note: Upon first connection it will prompt for username, password, and domain...
Just leave 'em blank and check "save password"