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Please read this if you considering unlocking the boot loader or rooting your phone.
Please note that you may void the warranty of your phone and/or any warranty from your operator if you unlock the boot loader. You should only unlock the boot loader of your phone if you are an advanced user with good knowledge of the technology and risks involved.
For more information go here http://unlockbootloader.sonymobile.com/
Please also note
The Sony Xperia support team will not be able provide any support, related to unlocking the boot loader or rooting your phone.
We also recommend you to read the below blogposts.
Sony Xperia support team
2013-04-07 04:29 PM - last edited March
It seems a lot of users are unaware of the "Emma" software by Sony. It provides us with the opportunity to flash stock firmwares of any customization on Xperias with unlocked bootloader. Many of you must be knowing that PC Companion and SUS cannot be used to install official updates on devices with unlocked bootloader. Well Emma is here for help.
Please read all the instructions before proceeding.
Presently it's in Beta stage and supports a limited number of Xperia phones Check the List of supported phones
Note: If you did not place the the Customization.ini file in the correct EMMA folder ( steps 3,4,5) then you won't be able to use it as it would ask you for username and password. So kindly follow the steps correctly.
How to Flash using Emma
For a Video tutorial, check this Link
Remember : The first time you start your device after you have flashed it, the boot-up might take a little longer than normal.
For more info, visit http://developer.sonymobile.com/services/flash-too
2013-09-02 01:16 PM
this flash tool isn't working at all. i followed the instructions on how to download and install. i also follwed the instructions on how to use it. but my neo v isn't appearing on this EMMA flashtool. useless!
2013-09-09 05:25 PM - edited 2013-09-09 05:37 PM
This thread was locked and don't know how come it's open again.
Both of you make sure you're following the steps correctly.
Have you pasted the customization file in the correct place ? without that you can't even run emma.
Phone should be connected in flashmode. Without that , Emma won't recognize a thing.
Please post further in this thread
March - last edited March by alexdon
Hello everybody, I have Emma software and I was already installed it, but I do not have Customization.ini file. Please I need this file to execute software without registration. Thanks for all.
My Email is
I just downloaded the package and can confirm that it has the Customization.ini file in it.
Kindly redownload this http://developer.sonymobile.com/downloads/tool/fla
After that extract the zip file using any software you have and then you will have the customization.ini file as well as emma setup.