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GT-I9300

(GALAXY S ?) DOWNLOAD FIRMWARE: I9300UBUGML1

Firmware Details:
Model: GT-I9300 / GALAXY S ?
PDA/AP Version: I9300UBUGML1
CSC Version: I9300TFGUGML3
Bootloader/ BL: I9300UBUGML1
Region: TMM / Mexico
Carrier/Brand: Movistar Mexico
OS: Android / Jelly Bean
OS Version: 4.3
Build Date: 17/12/2013
Security Patch Level: N/A
Changelist: 2320216
CRC: NULL
Size: N/A

This firmware also works for:

You will download the app that will download the latest version of the firmware. Why should you use this app instead of download directly?

How to flash your phone with the new firmware?  How to update SAMSUNG device? How to change firmware in your device?

Click here to read the article about installing downloaded software