If you are not using this kitkat v4.4 you are really missing things.
To all the Samsung Galaxy S GT19000 users, follow the steps

==> make sure your Android Battery is above 50%.
Also, make sure that the USB Debugging is
enabled from the path “Settings > Applications >
Development > USB debugging”, enable the USB
Debugging in your device.
==> Make sure your Galaxy S device is rooted or
not by using ROM Manager app. ROM Manager
app can be installed from the Google PLAY Store.
If it’s rooted, continue to the below, if not request
for a guide on how to root it.
HOW TO UPGRADE TO KITKAT
download kitkat 4.4 package from
here to your computer. Once downloaded,
connect your phone to the computer with the
help of original USB cable and place these two
zip files in your device.
· ==> Turn Off your Phone so that it can be
entered in the Recovery Mode. Recovery mode in
Galaxy S GT I9000 can be entered by pressing
the Volume Up Key + Menu Button and then
press the Power button. Just in case if the device
gets turned ON in the normal mode, then you will
have to retry the process of entering the device in
the Recovery Mode.
· ==> Just in case if your device refuses to enter
into the recovery mode, download the “ ROM
Manager” app from the Google PLAY Store, install
custom Recovery image and then enter the
device into the recovery mode with the help of
ROM Manager.
· ==> In recovery mode, select “install zip from SD
Card” to choose the KitKat 4.4 Firmware Package
and then the Google Apps Package. Please note
that, it might take around 4 – 5 minutes for
applying the update. Once updated, select “Go
Back” and choose the option of “Reboot System
Now” for rebooting the device.
Note: Just in a rare case if the device doesn’t boot
up or show the home screen then remove the
battery and reinsert the same to boot the device
again in the normal mode.
You can check the firmware update from the path
“Settings > About Phone > Firmware Version”
where the firmware update version will be
mentioned.
Are you confused? Ask your questions.