[Q] Xperia Z3 D6603 manual update

[Olivum09]

Hi,
My Xperia Z3 D6603 din't get the latest 5.1.1 update from sony, as the xperia support site claims to be.
Now I know that there are tons of reasons why my device din't get the update, so i was wondering how i can manual update it.
Reading some threads I find out that there is a tool, called Emma, developed by sony, which is supposed to flash official OS on the Z3. That's why i downloaded the new 23.4.x.x update.
My concern about using that executable is related to the warranty and if it will be void using it.
Another doubt was about rooting my device. Here on XDA I found a little bit of chaos about it. Someone told that in the EU there isn't any problem about rooting my phone because all hardware related problem are warranty covered. Others told that Sony and other OEMs refused to take back the phone even paying for the fix, but I don't know if this rumours are true.
I have already rooted two devices, a HTC sensation and a Nexus 4, but this Z3 seems to be a little bit trikier.
What should I do?
Oliv

 

[E-Chan42]

I have a similar issue, I'm running 5.0.2 on a rooted device and all I get is "could not verify" if I had the update ".zip" file I could manually flash but all I can find is the full rom itself, I don't want to wipe my device

 

[gregbradley]

You cannot use EMMA unless you have unlocked your bootloader which voids your warranty
What you need to do is download the original flashtool developed here on XDA from flashtool.net and flash an updated FTF. Done. It will not void your warranty

 

[Olivum09]

Where can i find, outta there, a guide about that tool.
On that site they only talk about Phones which have unlocked bootloader, and my Phone is completely locked.

 

[tweker]

Rooting does NOT void warranty. Unlocking bootloader will but, again, flashing a stock ftf relocks the bootloader, so that is a moot point.
If you want 511, root it first and the flash a 511 zip. Easy.