Stopped in a ATT store today and the rep I talked too said he had not heard of any issues... Blamed Samsung for the issue and then look at his computer and said that ATT is going to release 4.4 in January for the S4. I was really!!!(not sure I believe him) The 2nd rep when asked by the rep working with me chimed in that he had issues updating to 4.3 also. So their final answer was to wait it out....