[Matt]

have you tried a profile update?

67 means invalid Username or Password on the sprint vision network. The first step to resolving that is to do a Profile update, available in Start-Settings-System, update data profile.

If that doesn't fix it (or you get another error, like 1012), your best bet is to call Sprint. It could be a provisioning issue on their end.

Also of note, repeated attempts can cause a 20 minute lock out period