But I am on the note forum....
I thought ATT released KitKat OTA update for Note 3? Besides, I first got the notification around the same time they announced it. In the past all updates worked fine. This is the first one that fails.
There's different sections on XDA this is the Note 3 sub section, then there's the VERIZON sub section then SPRINT and ATT. I linked you directly to the ATT subsection, which contains info for the ATT model as its completely different to the N9005 and N900.
Your model is N900A. If you use firmware from here or get stuck we can't help you as we aren't familiar with ATT model.
Sent from my ZX Spectrum +2 via an app or something..