The most Galaxy S III users received for the last time an Android 4.0.4 update for their device.
Samsung will start at the end of this month begin next month with the Android 4.1.1 (Jelly Bean) updates.
The latest OTA update by Samsung based on Android 4.0.4 will fix some old bugs.
The size of this update is around 27.4 MB Samsung does advice to use OTA or Samsung's own program called KIES.
Make sure you have a full battery when you update your device using OTA or Samsung KIES.
Don't forget to keep an eye on our website to get as first the official Jelly Bean updates by Samsung.
