[OR78]

Ok you updated PRL but what about 'Update Profile' When you do this, since you are on Sprint, this configures your phone to be registered on the network. Also verify that you did not accidentally turn off your radio. Have you tested the phone yourself by chance? Calling it from a landline?

You may be right though, it could have been a network glitch. But It doesn't hurt to check your settings. Use ##778# and view your 'NAM' settings to ensure your mobile directory number is set(this should show your phone number)

To better tweak your phone...if you know your MSL, you can edit your ACCOLC to a lower number...3 being the lowest recommended. If you are at a 7 or 8 the network may be pushing your call off the priority list.