[Sideman7]

Here goes:
Enter account to edit settings.
Step through the settings until you get to "outgoing mail server"
Enter "smtp.sprintpcs.com" then check "outgoing server requires authorization"
Click "next"
Now on the "outgoing server login" screen: enter username (this is the part before your @sprintpcs.com address)
Enter you sprintpcs.com password

That should be it.