unlock bootloader of samsung phones

Before you try to install any custom ROM on
your
device, you need to unlock the phone’s
bootloader,
which is a code executed before any OS
(operating system) launch. The notion of a bootloader is
unanimous to all operating systems worldwide
and
includes systems running on your personal
computers, laptops, tablets, smartphones, smart
watches and basically everything that has OS on it
HTC website has a section for developers where
you can grab SDK; you just need to find your
phone’s model. Samsung website does not offer
such luxury, Sony Mobile website offers a
section for users looking to unlock their Sony’s bootloader.
So, For Samsung Devices How to unlock
Bootloader?
To unlock the boot loader you need
to
have the ADT with all the packages installed
and configured. Later once the configuration is done
properly then you can connect your device and
enable USB
Debugging under the options.
1. Download
Modaco’s Superboot files HERE and save
them to your computer.
2. Once downloaded, extract it by right clicking
and extract all.
3. On your phone, click on
Settings > Developer
Options > Turn USB Debugging On.
4. Plug the
device in to your computer via USB
cable.
5. Open the superboot folder that we just extracted (until you see the folder with
fastboot-windows inside it), then hold the shift
key down on your computer and right click
any blank area.
6. Now, select open command
window here.
7. In the command prompt, type
the following
with hitting enter at the end of each line. adb-
windows reboot bootloader (and wait for the
device to reboot) fastboot-windows oem
unlock
*If it gets stuck at waiting for device here, download and install PDANet on your computer,
once installed, unplug then plug the device
back in
and see if that fixes it. Once it runs the device
should display a screen asking you if you are
sure. Click yes using the volume buttons. The device will go back to the
bootloader screen but say unlocked at the
bottom.
Note: please take up the backup if not done
properly you will lose all the data... This process
some samsung phones only.. not for all..