Galaxy S III devices with Android 4.3 update reportedly suffering major problems

Among the problems, and they are not mere annoyances, are reduced battery life, application crashes, Wi-Fi connectivity problems and complete lock-up that can only be remedied by a battery pull. That does not sound like much of an update.
Samsung is not always able to stick to its timeline when it comes to updates, but at least it puts forth the effort. Once these issues are ironed out, we hope performance will improve and those that are (im)patiently waiting will see your updates soon.
source: SamMobile