[Q] galaxy s3 i747m 4.1.2 to 4.3
I have a Galaxy S3 i747m Version 4.1.2, and I want the past to version 4.3.
when I try to do the parameter from the phone I get a message that displays "your device has been changed. upgrades, software updates are no longer available"
how I can do it from the computer? and what do I need to download as an application?
excuse me for my English is google who translated