AT&T sends out Android OS enhancements to a trio of Samsung phones
If you're hoping that enhancements is a code name for Lollypop, forget it. All three handsets will remain on Android 4.4.2 following the update. And since the trio are receiving the enhancements OTA, they are being sent on a staggered basis. That means that it might take a few days before it hits your handset. You can try to pull out the update manually by going to Settings > More > About Device > Software update > Check for updates.
The size of each update depends on the device. The one for the Galaxy S III weighs in at 69MB, while the GALAXY Note II update tips the scales at 93.2GB. The Galaxy Mega update comes in at 77.3MB. If you're an AT&T customer with any of these three models, and you have downloaded and installed the update, let us know what changes you find on your handset by dropping your comments in the box below.
source: AT&T (1), (2), (3) via AndroidCentral