AT&T pulls Android 4.3 update for the Galaxy S4

Samsung started rolling out the Android 4.3 update for the Galaxy S4 a while back. The AT&T version in the US also started receiving the update just last week itself. However, AT&T has already pulled the plug on the update.
Although AT&T hasn't yet provided details as to why the update was pulled but it's easy to guess why. Just recently Samsung pulled the Android 4.3 update for the Galaxy S III, citing technical issues that caused several problems on the devices that were updated. AT&T may have noticed similar problems on the devices that received the update.
No information is available as of now as to when the update will start rolling out again.
For more info check http://www.gsmarena.com/android_43_update_for_at_t_galaxy_s4_gets_delayed_as_well-news-7209.php