Samsung is a fat cat for money, it's a sad but true fact. They want you to buy the new gs4, but the fact is many people who already have really good smartphones like the s3 won't. They want you to upgrade and spend the extra money, it's what keeps them rich. They slowed down jelly bean for that very reason, to make you upgrade. I'm running carbon rom which is basically a nexus experience with a lot of tweaks. It's so fast that when I went back to the stock jelly bean rom I was shocked, my amazing gs3 turned into a slow laggy monster. Now I know this is the i9300 section, so roms for your variant are going to be different than mine. But I highly recommend rooting and installing a custom rom on your galaxy s3. Let the guys who want to make your phone a wonderful experience do their job, they want to see you happy not spend another 300 bucks for an "upgrade". Samsung is just going to screw you over, like many phone manufactures try to do. If you want to see the galaxy s3's true capability, and not a dumbed down smartphone, I highly recommend a custom rom.
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