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The new android 4.3 and firmware .205 update is not that good enough you guys know, update means to fix things not to break them. i got few problem like most of the users, First and very important, battery. its not working fine after the update, draining fast, touch is working pathetically, phone is getting heated up very often, camera quality got even poor, interface has became laggy and theres a huge list to go. Hard reset didn't work for me either. so are Sony devolopers doing anything to fix things up or just concentrating on their whole Z things. let me know if theres any upcoming update for SP on the roll please, or if you got some solutions for that..
haha you almost made me cry on that
cuz i just purchased this phone few months back due to low budget so cant get a new one, cant flash, warranty issus. and you know the problem,
any custom ROM u can prefer for a good battery life and enhanced performance?
thanks for the reply btw.
finger crossed dude, lets see..

Hi
As bad as it sounds the Xperia SP has reached end of life and Sony officially confirmed this-so we will not get anymore updates. Unfortunately your stuck with what you've got (and so are all other SP users).
I have experienced horrible battery drain (android os) and poor RAM managment but to fix it what I did was root the device and remove bloatware and install greenify to 'freeze' apps. So far it is working on stock ROM. Custom ROMs are good but they can be buggy whilst at the same time fun to use especially when they have ported features from newer Xperia's.
Check out XDA here, it has several ROMs for the SP.