Hola, me acabo de pillar un Sony Ericsson Xperia Ray de Vodafone por los puntos y tal, el hecho es que he ido a rootearlo mediante el z4root (método que use para mi antiguo movil el, Samsung Galaxy 3 (i5800)) , el SuperOneClick y finalmente por este método http://android.scenebeta.com/tutorial/hacer-root-cualquier-terminal-metodo-universal y me no he podido hacerlo, me sale el texto de abajo. 

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              Easy rooting toolkit (v1.0)

                   created by DooMLoRD

        using exploit zergRush (Revolutionary Team)

   Credits go to all those involved in making this possible!

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 [*] This script will:

     (1) root ur device using zergRush exploit

     (2) install Busybox (1.18.4)

     (3) install SU files (3.0.5)

 [*] Before u begin:

     (1) make sure u have installed adb drivers for ur device

     (2) enable "USB DEBUGGING"

           from (Menu\Settings\Applications\Development)

     (3) enable "UNKNOWN SOURCES"

           from (Menu\Settings\Applications)

     (4) [OPTIONAL] increase screen timeout to 10 minutes

     (5) connect USB cable to PHONE and then connect to PC

     (6) skip "PC Companion Software" prompt on device

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 CONFIRM ALL THE ABOVE THEN

Presione una tecla para continuar . . .

--- STARTING ----

--- WAITING FOR DEVICE

* daemon not running. starting it now *

* daemon started successfully *

--- cleaning

rm failed for *, No such file or directory

--- pushing zergRush"

90 KB/s (23052 bytes in 0.249s)

--- correcting permissions

--- executing zergRush

[**] Zerg rush - Android 2.2/2.3 local root

[**] (C) 2011 Revolutionary. All rights reserved.

[**] Parts of code from Gingerbreak, (C) 2010-2011 The Android Exploid Crew.

[+] Found a GingerBread ! 0x00015118

[*] Scooting ...

[*] Sending 149 zerglings ...

[*] Sending 189 zerglings ...

[-] Hellions with BLUE flames !

--- WAITING FOR DEVICE TO RECONNECT

if it gets stuck over here for a long time then try:

   disconnect usb cable and reconnect it

   toggle "USB DEBUGGING" (first disable it then enable it)

--- DEVICE FOUND

--- pushing busybox

2103 KB/s (1075144 bytes in 0.499s)

--- correcting permissions

--- remounting /system

mount: permission denied (are you root?)

--- copying busybox to /system/xbin/

/system/xbin/busybox: cannot open for write: Read-only file system

--- correcting ownership

Unable to chmod /system/xbin/busybox: No such file or directory

--- correcting permissions

Unable to chmod /system/xbin/busybox: No such file or directory

--- installing busybox

/system/xbin/busybox: not found

--- pushing SU binary

failed to copy 'files\su' to '/system/bin/su': Read-only file system

--- correcting ownership

Unable to chmod /system/bin/su: No such file or directory

--- correcting permissions

Unable to chmod /system/bin/su: No such file or directory

--- correcting symlinks

rm failed for /system/xbin/su, Read-only file system

link failed Read-only file system

--- pushing Superuser app

failed to copy 'files\Superuser.apk' to '/system/app/./Superuser.apk': Read-only

 file system

--- cleaning

--- rebooting

ALL DONE!!!

Presione una tecla para continuar . . .

Tengo el modo usb en depuracion y habilitada la opción de permitir apps de fuentes desconocidas, asi como para que la pantalla se apague a los 10 mins, ademas de instalado el Sony Ericsson PC Companion para los drivers.... alguien me puede ayudar!???

Número de modelo

ST18i

Versión de Android

2.3.4

Versión de banda base

8x55A-AAABQOAZM-203028D-64

Versión del kernel

2.6.32.9-perf

SEMCUser@SEMCHost#1

Número de compilación

4.0.2.A.0.62