Hi, I'm new to Android and I really need some help because I don't know what to do anymore. My SGS2 is a GT-I9100G and I updated Gingerbread from 2.3.3 to 2.3.6 thinking that this would solve some freezing and crashing problem I was having with the phone. Let me say that during this time, my battery (with the use of JD Ultimate) was working beautifully enough for me at least with 30+ hours on battery with moderate use. Lately I noticed that my battery has been draining very quickly (down to 75% in under 4 hours) and I know this topic has been beaten to death so I did some research in solving it before posting a question here. It was during this time that I found out that this 2.3.6 update may not be suitable for my international model of the SGS2 so I decided a factory reset would be my best option. I did check "wake locks" through Better Battery Saver but didn't really see anything that was causing the problem. Something was continuously using the battery for sure, but being "Android OS" at 58% constantly, I really have no idea what. I did come across several articles on downgrading to 2.3.3 manually but like I mentioned, I'm really new to Android and I just don't understand all the technical jargon. I backed up all my stuff and did the factory reset. Maybe it's just me who doesn't know this but Gingerbread remains at 2.3.6! I am shocked and rather upset that I went through all that trouble for nothing. Now I'm at a loss for what to do. As far as rooting the phone goes, I'm not confident enough in my knowledge of Android to go about that. Is there a way for me to revert back to 2.3.3? Can you help me please? Thanks!