Here is another example of how to root your android via z4root.

Here is another example of how to root your android via z4root.
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How to root a Samsung Galaxy S with z4root

Please follow the instructions given below. You need to know how to transfer files from computer to you mobile. If you are using windows, download the SAMSUNG KIES and use it to transfer files, or if you are using  a Mac Os, you can just connect your phone and put it on transfer data. First go to Settings -> Applications and put check on "Unknown Sources". This will allow you to use cracked apps.Second step is to download the z4root from the link above.Locate the z4root using file manager (download the astro file manager it's best and free)After installation lunch the apk and select the "Root" option. And the you're done.
I repeat this has worked perfectly on my GalaxyS!!

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