Desde XDA; como no. Nos traen esta APP para hacer y deshacer root con un solo click
NOTA: Antes de usar el programa asegurate de tener el modo depuracion USB activado y Flashea un Kernel_Insercure
S2 Root v1.1
Whats New in v1.1:
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1. Added: 'Jump To Download Mode' Button for those that cant use the 3 Button Combo or dont have a Jig to put the device into Download Mode.
2. Added: 'Don't Reboot Device When Finished' option for those that want to carry on tinkering after Rooting / UnRooting.
Ir al link original: http://forum.xda-developers.com/showthread.php?t=1125414
saludos