i miss that performance

[bl4z3d.se]

it's from my Xperia SP, build version :12.0.A.2.254 before the 12.1.A.0.266 update this is my record

[jaggerkieth]

A bug fixing update will be released very soon. New firmware has been certified.

[jollyboy]

I am having the same issues after updating to Android 4.3. The phone has become very slow and no matter how many programs I disable it still keeps using nearly 700-750 MB of RAM. Considering I bought this phone just last week its a bit of a let down. Please fix these issues fast. 😕

[Danial-mach1]

After some days your old battery life will be back

[_alexdon_]

Sometimes a factory reset or a software repair helps.

[Meid]

I,must say that I updated and nothing was ok, I repair and nothing was ok too, but, I repaired and nothing was ok too but I repair again and after that I configured the steps to use my mobile, and after that, I just done a factory reset and configured the first steps again, after that I installed and configured all what I wanted and now is ok

I recommend use a repair install, after that follow the,first steps and then go to adjust and factory reset and use like you want, now for me is all ok!