The AT&T Samsung Galaxy S4 is getting the 4.3 OTA update today that includes Galaxy Gear support. The update is weighing in at 719mb (that’s like 4 typical CyanogenMod ROMS), build number JSS15J.1337UCUEMJ9, brings Android version 4.3, Galaxy Gear support and a new KNOX enterprise security suite. Just like the Nexus 7 and Nexus 10 ...