On http://www.sammobile.com/firmwares/3/?download=25522 they have the new update to 4.3
Model: GT-I9300
Model name: Galaxy S III
Country: Trinidad and Tobago
Version: Android 4.3
Changelist: 2320216
Build date: Tue, 17 Dec 2013 18:50:11 +0000
Product Code: TTT
PDA: I9300UBUGML1
CSC: I9300UUBUGMK1
MODEM: I9300UBUGMK1
Model: GT-I9300
Model name: Galaxy S III
Country: Trinidad and Tobago
Version: Android 4.3
Changelist: 2320216
Build date: Tue, 17 Dec 2013 18:50:11 +0000
Product Code: TTT
PDA: I9300UBUGML1
CSC: I9300UUBUGMK1
MODEM: I9300UBUGMK1
