Update: Let us not forget the Galaxy Tab S 8.4. AT&T has updated that device this week as well, bumping it up to KOT49H.T707AUCU1ANJ5 after a 32MB download. As for the changes, they're a yawn.
- Carrier Billing enhancements
- Updates to ATT Mail, Keeper, YPMobile
Those changes are largely the same as the Galaxy Tab S 10.5's OTA this week. This 58MB update left the device at build number KOT49H.T807AUCU1ANJ5.