I updated my phone to Androd 4.1.2 JB via ODIN almost a month ago. I really like it,the interface and everything but it looks to me that my phone was performing a bit better before the update. I check my Ram status and after clearing memory the used ram will never go less than 600mb and I dont even have much things installed like facebook or messenger that take a lot of ram. I remember it going about 400 before. I also think the battery drains a little bit quicker. So I would like to know if there is a way to get back to 4.0.4 without causing problems and possibly without root? Maybe via odin just like 4.1.2? ( I've been doings mods on my previous phone but I'm still not as good informed as I should be)