TURN OFF OLD CELL IF TRANSFERRING NUMBER FROM DIFFERENT CELL PHONE PROVIDER
Until your old Cell Phone is turned off, the old company's computer has trouble releasing the old number to AT&T.
If you want to retrieve your messages, just call your cell phone number on a LANDLINE (not your old Cell Phone) and enter your Voicemail Pin Number and listen to your messages. Don't turn your old cell phone on.
I hope this helps those having trouble porting over their number to AT&T.
Larry
G5 1.8 / MacBook / PowerBook, Mac OS X (10.4.10), EyeTV 2.4 with EyeTV 500 (HD)