I am very very new to android development/rooting/custom roms etc so sorry in advance for such a question which might look silly for you, however I am a big noob in this.
So, basically I own I9070P and was very happy with it while it was on original firmware(Gingerbread), however my silly head decided to upgrade it to JB (did it through Kies).
Now...my phone sucks. It hangs, turns off automatically when more than 2 apps are run, battery on wi-fi connection is dying instantly, camera is laggy, in general I turned my phone into a piece of **.
So I was wondering is there anything I could do to fix it?
I would like to stay on JB or upgrade onto something newer, so please do not suggest rolling back to gingerbread.
Thank you very much in advance!