A new Galaxy S3 Android 4.3 Jelly Bean update is available for users to install, this time for the 3G T-Mobile version (model number T999), although you should remember that various Galaxy S3 owners had issues with similar updates, albeit in other markets.
As expected, the update is available either as an over-the-air (OTA) download on the phone, or via Samsung Kies. Furthermore, the update measures 486MB, so you should make sure you have a dependable Internet connection and enough battery juice to go through it...
Read the full story here... Source: Android Authority