His translation is unlocking the boot loader and I have explained in another post it means.
The open developer community is important to Sony, so they have made it
possible to unlock the boot loader for the launch of Xperia ™
certain devices from 2011 onwards. To find out which models are
compatible with this service, please see the Supported Phones page to
the left.
Please note that void the warranty of your device and / or any warranty
from your operator if you unlock the bootloader. See warranty
statement for your device for more information. In addition, due to
the modification of device software, the Sony network repair is
likely to have to replace key components before testing properly,
repair and verify the device using our tools and software repair.
Consequently, if Sony makes a warranty repair, Sony will probably be
charged a service fee significant additional costs caused by the
modification of the software.
Some of the contents of your device also may be inaccessible due to the
elimination of DRM and security key user data partition safe to
unlock the bootloader. We advise you to create backups as user data,
settings and accounts are deleted. For Xperia ™ devices published
2013 or later (for example Xperia ™ Xperia ™ Z and ZL), the SD card
from your device will be formatted and you will lose all content
(eg, photos, music, videos) to unlock the manager boot.
If you are fully aware of the risks involved, and have a thorough
knowledge about these technologies, go to bootloader unlocking
instructions page. You should be aware that unlocking the bootloader
will not give root access. The only way to get root access is a flash
custom ROM with root access.
Instructions
First, you should confirm that it is possible to unlock the boot loader
of your phone by dialing the service menu. On your phone, open the
dialer and enter * # * # 7378423 # * # * to access the service menu.
1. On the phone, press Info Service> Configuration> Rooting
Status. If Bootloader unlock allowed says Yes, then you can proceed to
the next step. If you say no, or if the state is not present, the
device can not be unlocked.
2. On the computer, click Continue at the bottom of this page to start the boot loader unlocking process.
3. Read the information in the popup and click Yes, I'm sure, if you're still sure you want to unlock the bootloader.
4. Read and accept the legal terms. Click I accept.
5. Enter your name, a valid email address and the first 14 digits of the
IMEI or MEID number (clear the last digit if necessary). Click
Submit. You can view the IMEI or MEID number by entering * # 06 # on
your phone.
6. The boot boot loader unlock key will be sent to your email. Save it for later use.
7. Download and install the latest version of Android SDK developer.android.com.
8. Download and unzip the file. This is the standard
android_winusb.inf-file with a few lines of code added to enable
Fastboot to support Sony and Sony Ericsson. Make sure you are running
Google USB Driver package version 4 or higher on your Android SDK. You
can see current Google USB Driver package revision in the SDK
Manager.
9. Place the unzipped file in the folder USB_Driver, located in the
Android SDK> extras> google folder on your computer. OK to replace
the old android_winusb.inf-file with the new file. If you can not
find the folder USB_Driver, install the Google USB Driver Packager
using the Android SDK Manager.
10. Turn off the phone.
11. On your phone, press and hold the Fastboot button while connecting
the phone to the computer with a USB cable. Fastboot button may
differ between different phone models. See page Fastboot button for
more information on using the button on your phone.
12. On the computer, you are prompted to drivers. Select the folder
where you placed the USB_Driver android_winusb.inf-file, and select the
Android Bootloader Interface-file.
13. Open a command window and navigate to the folder in the Android SDK tools.
14. Enter fastboot.exe-i 0x0fce getvar version, and verify that you get a
response back (eg "0.3"). This means that your phone is connected
properly.
15. Warning! If you perform this step jumps to the boot loader. This may
void the warranty and / or any warranty from your operator. If you
still want to unlock the boot loader of your phone, enter
fastboot.exe-i 0x0fce oem unlock 0xKEY, where key is the key to
unlocking bootloader you have at the beginning of this instruction. The
boot loader should now be successfully unlocked.
Now begin to unlock the boot loader of your phone. This way you can void
the phone's warranty. Sony can not guarantee full functionality of
your phone, and will not be responsible for any malfunction of the
phone, or property damage or personal injury caused by the phone.
Are you sure you want to continue?
Create bootloader unlock key request
To create an application, enter your name, IMEI (or MEID) and a valid email address.
You will then get the boot loader unlock key by email. You can view the
IMEI (or MEID) number by entering * # 06 # on your phone.
Clic here to enter your details and get the unlock code:
Are you really sure? | Sony Xperia
Please note! It will only be possible to unlock the boot loader for the launch of some of the following models of phones.
Sony Ericsson Xperia™ PLAY
Sony Ericsson Xperia™ arc
Sony Ericsson Xperia™ arc S
Sony Ericsson Xperia™ neo
Sony Ericsson Xperia™ neo V
Sony Ericsson Xperia™ pro
Sony Ericsson Xperia™ mini
Sony Ericsson Xperia™ mini pro
Sony Ericsson Xperia™ ray
Sony Ericsson Xperia™ active
Sony Ericsson Live with Walkman™
Sony Xperia™ S
Sony Xperia™ P
Sony Xperia™ go
Sony Xperia™ U
Sony Xperia™ sola
Sony Xperia™ acro S
Sony Xperia™ ion
Sony Xperia™ miro
Sony Xperia™ tipo
Sony Xperia™ tipo dual
Sony Xperia™ V
Sony Xperia™ J
Sony Xperia™ T
Sony Xperia™ TX
Sony Xperia™ E
Sony Xperia™ E dual
Sony Xperia™ ZL
Sony Xperia™ Z