How To Update Samsung Galaxy S2 I9100 to Gingerbread XWKE2 2.3.3 Firmware
So, as you can see that the Green colored bar will be shown which will mean that the firmware has been successfully flashed in your Galaxy S2 device. Since there is a cache memory of the previous firmware gets stored in the device, you will have to clear the same and which can be done by performing the full reset by dialing the short code *2767*3855# and then you will see that all the cache is cleared successfully. To check that version has been successfully updated or not you will have to type in the code as “*#1234#”.
Do, let us know if you encounter with any of the problems as we will ensure that all problems are solved. Please note that since you have updated your firmware, all the APN Settings will be cleared. So, to access all the data services / MMS / Internet, you will have to get the Internet settings from from your Service provider.