I think it's afflicting data on 4G phones only. My charge has been without data all day, 3G or 4G. If you're 3G only, I think you're fine. Sounds like it might be related to SIM card issues. 3G phones authenticate on the CDMA network with good ol' hardware MEID, but 4G phones authenticate with the SIM for both LTE and CDMA. That may be where the issue lies such that my wife's 3G phone is fine on 3G but I can't even get 3G on my 4G phone.
As of 30 minutes ago, I finally acquired and was holding onto 3G pretty well, but realized I had switched to CDMA only mode earlier today trying to get my phone working. When I toggled back to LTE/CDMA, I'm without data again. Hopefully they work it all out by morning.