UPDATE: Available for download from the sammobile server
The Galaxy S3, was updated in the November-December period to Android 4.3 JellyBean and has recently finished rollout almost all over the world. Despite this, after several updates (see: I9300XXUGMJ9 , I9300XXUGMK6 , I9300XXUGML2 , I9300XXUGNA5) the problems still haven't been completely solved, (if not the main ones: lockscreen lags, unstable Wifi, etc ...), and at the last update I9300XXUGNA5 (of January), some lag are still evident (the OTA package of I9300XXUGNA5 was of 35.55 MB). Today 22 / 04 / 14 has been released a new firmware (50 MB OTA) signed I9300XXUGND1 from the east.
Build Date: 31.03.14
OTA update weight: 50 MB
How to update?
There are 5 ways to upgrade our Galaxy S3:
1.Update via OTA (directly from the phone, in automatic mode) by going to Settings> Phone Info> Software Update> Update
2. Upgrade from Windows / MAC PC with Kies 3
3. Update from Odin in manual mode for Windows
4. Update with Heimdall from Windows / MAC / Linux platforms
5. Update with Jodin
Download Firmware Link (Terafile mirror):