I experienced the same issue beginning ca 36 hrs ago. After trying all the rebooting, changing password, etc procedures, I called AT&T and got the run around until a tech sup FINALLY told me it was their VV system that down all over the U.S., and that messages could only be checked using the manual method. Now, this is not like a service that is merely "convenient" - this problem has led to serious, even life threatening issues for many customers, simply because AT&T made the bad business decision to NOT send out mass text informing of the potential problem, and an ETA on repair - not a good Xmas gift! When I brought this up, they took no responsibility, merely said they would "pass on the suggestion".