Samsung Galaxy S3 Software Update. From android 4.0.4 to 4.1.2. From 4.1.2 to 4.3

Updating the Android System on Samsung Galaxy S3
Android 4.0.4, Android 4.1.2 and Android 4.3
Android 4.0.4
samfw.com/firmware/GT-I9300/PRO
Android 4.1.2
samfw.com/firmware/GT-I9300/ROM
Android 4.3
samfw.com/firmware/GT-I9300/RTL
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