Flashing official firmware always unroot your device. If you recently upgraded your Samsung Galaxy S2 I9100 using Hong Kong I9100ZSLPP official Android 4.0.3 firmware using our guide then you probably already noticed that you no longer have root access if you have it before flashing. In this tutorial we guide you how to get (back) root access and install CWM touch Recovery with gesture support in Galaxy S2 I9100 running I9100ZSLPP firmware. To obtain this we will flash SiyahKernel in your Galaxy S2 I9100 running I9100ZSLPP firmware using ODIN. Flashing of which not only root your device but also install
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