with this you dont need to press a button. it boots directly into recovery
http://forum.xda-developers.com/show....php?t=1183465

and i made a zip with a ICS bugfixed SU version 3.1 and busybox included

When I do the fastboot boot boot.img, it fails telling that my device must be rooted first.

Originally Posted by ayozito

When I do the fastboot boot boot.img, it fails telling that my device must be rooted first.

Unlock your bootloader..

Originally Posted by ayozito

When I do the fastboot boot boot.img, it fails telling that my device must be rooted first.

*Requirement
Unlocked Bootloader

Sorry for being a noob but can I do this on my arc 4.0.4 ics with unlocked bootloader

Originally Posted by andrioboss

Sorry for being a noob but can I do this on my arc 4.0.4 ics with unlocked bootloader

Yes. Use any Arc custom kernel which have CWM.

Originally Posted by max_r

First Thanks for the
Gjole86 & Madfysh


Requirement


ICS 4.0.4
Unlocked Bootloader
Fastboot
Base band 4.1.B.0.431

Flashable Zip
Superuser-3.0.7-efghi-signed.zip
------------------------------------------
Download Superuser-3.0.7-efghi-signed.zip"]superuser zip and paste into SD Card

HOTBOOT Method

lest start

Download Any Rootble Kernel
I recommend this one
http://www.4shared.com/file/LMJWQkxw/recoveryNeo.html (thanks for the Gjole86 )

After download this kernel put in fasboot folder and rename it as "boot"

Then open fastboot folder and press SHIFT+RIGHT CLICK


Click "Open Command window here"


After Click on that you can see Dos command window

Then Connect the Phone fastboot mode [ Press and holt menu button and Plug the usb cable]
Phone LED color should be BLUE


Copy this and past this code into DOS For HOTBOOT

fastboot boot boot.img

after that step
keep pressing volume down to get into CWM [Keep Pressing keep pressing ]

DONT LET THE PHONE START UP AT ANY COST! U MUST GO INTO RECOVERY RIGHT AWAY

Keeeeeeeeeeeeep Pressing and Dont Unplugged USB cable until appear CWM

After comes CWM you can flash Superuser.zip

note: - i recommend kernel has OLD cwm 
UP ---> volume up
Down---> volume Down
Select ---> power button

here is proof from my phone


with superuser app

Hi i did everything you said but this error appears

C:\qwe\fastboot>fastboot boot boot.img
downloading 'boot.img'...
FAILED (remote: The Device must be rooted first)
finished. total time: 0.000s

ohh sorry i just notice the above post replay!

@giannis753: in future, PLEASE don't quote ENTIRE post.
And yes, as you can see, rule is first read, then ask.

Originally Posted by giannis753

Hi i did everything you said but this error appears



ohh sorry i just notice the above post replay!

did you Unlocked your phone bootloader?

Originally Posted by max_r

did you Unlocked your phone bootloader?

After holding the menu button and plugging in the USB, the phone LED is BLUE and i ran the FASTBOOT command ...
it says <Waiting For Device> ...

for the last 10 mins i'm waiting ... what is wrong??

My phone is LT15i
ICS 4.04
Firmware 4.1.B.0.431