I'm looking to downgrade from 4.1.2 to 4.1.1. The current baseband is I747UCDMG2. Model is SGH-I747. I've read that going from 4.3 > 4.1.x can result in problems, so I wanted to ask if given this baseband it is okay to downgrade. Thanks.
I wouldn't recommend it. Last time I tried to do that I hard bricked my s3. And that is extremely difficult to fix or even impossible. But you can install 5.0 lollipop with cm 12 or kitkat with another cm version. They both look great and run well on the s3