I’ve tried every custom ROM on XDA Forums this week and have to tell you a lot of them heat up your phone, even when your phone is off. Well, I’ve found one ROM I am sticking with for now, the Kyan ROM for your AT&T Galaxy S3 SGH-I747.
The Kyan ROM is very simply, minimalist ROM with bloatware removed and seems to be working fairly well on my AT&T Galaxy S3. This could be a great ROM for those of you who want a lightweight ROM without all the bloatware. Plus, battery life seems to have improved a bit so try this ROM and let me know what you think!