If you have an AT&T Galaxy S5, you should be getting an OTA notification shortly for a nearly-500MB update, which includes exciting new features like not Lollipop. The software brings an upgrade to Android 4.4.4 (from 4.4.2), AT&T voice over LTE (AKA HD Voice), and some new bloatware that AT&T would like you to please use.
Here's the full changelog.
AT&T released a software update for the Samsung Galaxy S 5 (SM-G900A) on February 3, 2015. The update is available to customers to download via Firmware Over The Air (FOTA). Wi-Fi is required for the update and the file size is 487MB.
Software update includes
Android KitKat 4.4.4
Miscellaneous improvements, bug fixes, and security updates
HD Voice capability*
AT&T Service additions:
Mail - ATT Mail (att.net mail)
I know, I wouldn't be able to wait to download it, either. It's super exciting stuff. You can probably also expect that, if you're rooted, you may no longer be rooted after this OTA, so watch out. If you notice any other interesting changes in this not-Lollipop update, let us know in the comments.
I do think that it feels a bit quicker, but that may just be update placebo.