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One time poster
PrakashGD
Posts: 45
Registered: ‎2012-06-27

[Guide]Unlocking bootloader and rooting Xperia U wilth custom rom and Kernal

###[Unlock Bootloader]### [Xperia U]

Download:

http://j.mp/xps_fastboot_pkg [fastboot package with usb drivers]

1. Confirm that it is possible to unlock the boot loader

  1. Open the dialler and enter *#*#7378423#*#* to access the service menu.
  2. Service info > Configuration > Rooting Status
  3. If Bootloader unlock allowed says Yes, then you can continue with the next step. If it says No, or if the status is missing, your device cannot be unlocked.

2. Unlocking Bootloader

  1. Get the IMEI code for ur device: type *#06# in phone dialer.
  2. Go to: http://unlockbootloader.sonymobile.com/ .
  3. Scroll to the bottom of the page and click “Continue”. Finally you will get a “Create Unlock request” page, enter your IMEI (last digit needs to be removed), name and email address. You should now receive your unique unlock key, its displayed on screen, SAVE THIS KEY SAFELY.
  4. Extract fastboot_with_Android_USB_file.rar.
  5. Power off your phone and keeping the Volume Up button pressed connect the USB cable to PC this will trigger FASTBOOT mode(Blue) and windows will start driver installation,and point the driver install to that location (usb_driver) folder in fastboot folder.
  6. Hold SHIFT and right click on the background of the folder fastboot Select ’Open command window here‘. In the cmd windows typefastboot.exe -i 0x0fce getvar version . If a value is returned 0.5, it means the phone is correctly connected.
  7. Type fastboot.exe -i 0x0fce oem unlock 0xKEY and replace KEY  with the key which u saved earlier.
  8. Your device should now be bootloader unlocked.

————————————————————————————————————————–###[Relock Bootloader]### [XPERIA U ]Download:http://androxyde.github.com/Flashtool/ [FlashTool]http://tiny.cc/Add-on_Device_ST25 [Flashtool Add-on Device ST25] Relocking Bootloader

  1. Extract Flashtool & install \Flashtool\drivers\Flashtool-drivers.exe
  2. Extract ‘Flashtool Add-on Device ST25.rar’ to folder Flashtool.
  3. Put Xperia_U_ST25i_Relock_Bootloader.ftf to \Flashtool\firmwares
  4. Run Flashtool, Click Flash(electric symbol). Click Flashmode then OK.
  5. Choose version –> Relock Bootloader  then OK.
  6. Power off your phone and keeping the Volume Down button pressed connect the USB cable to PC this will trigger Flashmode (Green).
  7. Your device should now be bootloader locked.

————————————————————————————————————————###[ROOT]### Xperia UDownload:http://j.mp/xps_fastboot_pkg [fastboot package with usb drivers]http://tiny.cc/ST25i_Pre-Rooted_IMG [Pre-Rooted system.img] Note: To do this, you phone must unlocked bootloader Rooting

  1. Extract fastboot_with_Android_USB_file.rar .
  2. Extract Sony_Xperia_U_ST25i_v2.3.7_Pre_Rooted.rarto \fastboot\Sony_Xperia_U_ST25i_v2.3.7_Pre_Rooted.img
  3. Power off your phone and keeping the Volume Up button pressed connect the USB cable to PC this will trigger FASTBOOT mode(Blue).
  4. Hold SHIFT and right click on the background of the folder fastboot Select ‘Open command window here‘. In the cmd windows typefastboot flash system Sony_Xperia_U_ST25i_v2.3.7_Pre_Rooted.img
  5. Power ON your device
  6. Your device should now be ROOTED.

Guide:

  1. Download the kernel.elf: http://d-h.st/aoY
  2. Place it to fastboot folder
  3. Power off your device and connect to PC with fastboot mode
  4. Enter following command “fastboot flash boot kernel.elf”
  5. Reboot

Via[My Public Site for Supporting Xperia U] http://sxu.filearena.x10.mx/?p=10

Source: http://forum.xda-developers.com/showthread.php?t=1527159

Source2: http://forum.xda-developers.com/showthread.php?t=1669906

Source3: http://forum.xda-developers.com/showthread.php?t=1688169

One time poster
alematteviet
Posts: 4
Registered: ‎2012-11-17

Re: [Guide]Unlocking bootloader and rooting Xperia U wilth custom rom and Kernal

Thank you for the nice job...

I have got a problem.. when I go on the cmd window after typing the string it prints me the message . I think the problem is about the drivers not properly installed.

I've been trying to repeat the operation, for half an hour.. I'm going to give up...

May I ask you for suggestions?

Thank you in advance

One time poster
Rado77
Posts: 257
Registered: ‎2012-08-14

Re: [Guide]Unlocking bootloader and rooting Xperia U wilth custom rom and Kernal

Maybe drivers, maybe you have not set "USB debugging mode" in phone...  For rooting you can also check xda-dvelopers.com : http://forum.xda-developers.com/showthread.php?t=1933985 :smileywink:

One time poster
alematteviet
Posts: 4
Registered: ‎2012-11-17

Re: [Guide]Unlocking bootloader and rooting Xperia U wilth custom rom and Kernal

Thank you Rado.

That was really naive of me, in fact I didn't set the debugging modo first...

The first time I tried to do it the laptop tried to install the drivers but obviously wrote me "drivers installaation failed"..

Now I've set the debugging mode but after connecting the phene in the fastboot procedure the connection fails and soon after  the smartphone start charging..

The very first time, (and only that time) that I tried (with the debug mode off) the computer did try to install the drivers (failing) but now it is not even trying anymore...

I'm sorry for asking so silly questions..thank you for your help..

One time poster
alematteviet
Posts: 4
Registered: ‎2012-11-17

Re: [Guide]Unlocking bootloader and rooting Xperia U wilth custom rom and Kernal

btw I did delete fastboot and downloaded it again...but nothing changed

One time poster
AlexTorresred
Posts: 2
Registered: ‎2012-11-03

Re: [Guide]Unlocking bootloader and rooting Xperia U wilth custom rom and Kernal

I don't know how but I hve just made it.. next step let's root! :smileyhappy:

One time poster
AlexTorresred
Posts: 2
Registered: ‎2012-11-03

Re: [Guide]Unlocking bootloader and rooting Xperia U wilth custom rom and Kernal

Rado you are great!

I did root it in a second thank to u!

Now I just have to find the best rom (kernel) for xperia u.. any suggestion on that? :smileywink:

One time poster
Rado77
Posts: 257
Registered: ‎2012-08-14

Re: [Guide]Unlocking bootloader and rooting Xperia U wilth custom rom and Kernal

No problem :smileywink:   That's why I posted that link here because that rooting method is really quick&easy. Regarding custom ROM.....it's hard to say what's the best or good or bad. On other phones (HTC Desire Z) I tried for example CyanogenMod 9 but phone gets bootlooped. I also tried some other ROM, but it had design like from year 5 :smileylaugh:   My suggestion is only fine-tuning of current official ICS by installing Titanium Backup Root and through it uninstall all useless apps and ICS parts :smileywink:  But if you really want ICS with different look, go to xda-developers.com and in right upper corner find "Xperia U". That will filter only XU-related topics. n section "Xperia U developement" or something like that are threads with custom ROMs from many guys/ But you know - everything is on your own risk...

Visitor
mhossain98
Posts: 26
Registered: ‎2012-11-10

Re: [Guide]Unlocking bootloader and rooting Xperia U wilth custom rom and Kernal

I am running ICSc.0 is it possible to root in above mentioned procedure?

One time poster
kcoolkartik
Posts: 1
Registered: ‎2013-07-17

Re: [Guide]Unlocking bootloader and rooting Xperia U wilth custom rom and Kernal

will this work for 6.0.B.3.188???