I have i9023, and received the update from 2.3.6 to 4.0.3. Now i would like to downgrade to initial firmware (2.3.6). Does anyone know how to do that? On my nexus s looks ugly, fade and darky blue collors, lag in phone mode response, lag in virtual keyboard typing and many other unconvenients. 2.3.6 worked flowless, without mistakes, thats why i would like to downgrade. If anyone knows that, pls pls pls post it.