Sony Xperia SP destroyed after 4.3 update - a desperate user final thoughts.

[Arvalas]

I have bought XPERIA SP at DECEMBER... almost perfect phone with Jellybean 4.1.2 .... everything was going extremely fast and smooth, after the UPDATE to Android 4.3 my phone is completely USELESS... literally nothing is working without LAG , LAG , LAAAAGGGG !

The leds dont work , the call button works after a lot seconds... , walkman turns off by itself , the ram is depleted only 100mb free , the phone generally lags anytime in anyway! , about the half of default applications come up with the "Its not responding (Wait , Close , Report) " error

This is the last time i give my money and trust in SONY . This is the biggest failure purchase i have ever done... 299 euros at the garbage...

PS. Oh some info --> Called sony and we made REPAIR by Companion , NOTHING! , Called sony again we did Fresh re-install via SUS ... NOTHING .... went to SONY SERVICE and after 3 days they gave me the same phone with the SAME BUGGY software with the same EXACT problems... because its not ANDROID's fault BUT ROM's fault .

All the problems here are with new clean updated phone via SUS and factory reset after that so nothing can go wrong,,, but NOTHING .

And still nothing like a rollback to 4.1 to repair our devices or a new software update that resolves these issues after 2 months of silence from SONY. I know because i am a programmer that takes a lot of hours to debug and make new update from scratch but its not my concern i demand my phones integrity to be as like it was at the beginning.

I cant do something else , i'm just feeling unlucky and sad because i lost a lot of money . (i'm trying to remember the 2 months of the phone's brilliant usage with android 4.1.2 )

[pator]

I have the same opinion as yours.. Im afraid to root my phone to get back to 4.1.2 because i maybe void my warranty. And if my phone gets destroyed, i cant ask help from my manufacturer or carieer.

[_alexdon_]

I am sorry to hear this,what about trying to downgrade?

http://talk.sonymobile.com/t5/Xperia-Z-ZL-ZR/How-to-manually-update-downgrade-root-2013-Xperias/m-p/...

[_alexdon_]

To downgrade you do not need to root.If the tutorial I gave seems too hard,try looking for one on XDA:

http://forum.xda-developers.com/xperia-sp

[Arvalas]

The only thing that prevents me from rooting is that if a tiny thing go wrong i will loose my phone and my warranty so i prefer to use it with lag and these bugs. Seriously i thought of that but i cannot risk it i'm trapped like many other users.

[pator]

We are just afraid of losing warranty, and something goes wrong we can throw our SP to the thrash!

[_alexdon_]

Yes,warranty should not be lost while downgrading,but some carriers do not accept other than latest firmware.

[Thommo]

A selection of firmware's are here - However you do need to sign up to download - Once you have selected a firmware file and downloaded then all instructions etc etc are on the same page after selecting a firmware file

[pator]

That sounds interesting! Could you give me a direct link to the downgrading guide?
Can I apply the latest firmware ( 4.3 12.1.A.0.266 ) with SUS, after i downgrade my phone if i would like to send it to my carriers service? Because if its automatically applies the latest firmware then it doesn't matter if i downgrade before it or not! 
Sorry for my bad english if it wasn't clear!

[pator]

I had 12.0.A.2.254 this firmware when i bought my phone if i can remember. But i can't found this firmware at the site you linked.