[HOW-TO[ROOTING]HDC Galaxy i9300 SIII PLUS - MT6577 Rooting Tutorial

 

Download this: CLICK

UNTESTED but for WIN7 Users these drivers could be needed???: CLICK

Unpack it.

Start the flashing tool.

Click on "Scatter-loading" to load the MT6577_Android_scatter_emmc.txtfile, the flashing tool should looks exactly like this:

  

Click on "Download", you'll get a warning message:

Continue anyway.

Your phone is OFF.

Remove the battery.

Insert the battery.

Connect the phone via USB-datacable to your pc.

It SHOULD trigger the flashing process. If this is the first time you are doing it, you should be asked to install a driver. The missing driver is located in the

SP_Flash_Tool_v3.1222.00 / new usb driver folder. After the driver is installed, you may have to start the flashing process again.

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Edit: For Windows 7 users:

Start c/windows/system32/hddwiz.exe (as admin)


Click next

Manually select hardware

List all devices

Select the driver (for example usb2ser_Win764.inf)

from the List select "MediaTek Preloader USB VCOM Port"

(I don't have Win 7 running, so I can't verify this) 
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Flashing the bootimage should only take a few of seconds, on success the flash tool looks like this:

Your phone should now be rooted, if you find a "Superuser" App on your phone, everything went well.

Good luck and remember,

YOU ARE DOING THIS AT YOU OWN RISK!!!!

And PLEASE don't try this with ANY other phone or model, this will ONLY work with the phone I have linked above!  

Credit for rooting the bootimage goes to:

hardi435
via colonelzap