erm sifus, as mentioned before i have this sgs2 i9100G with ICS 4.0.3, baseband version is I9100GDXLP6, so this phone will have problem such as after making calls, screen timeout went into standby mode, press the on button to turn on the screen, try to press "back" button but it hangs there at the dialer page.
another problem is during phone calls, when we cover the sensor on top, the screen blackout, but when we move away from the phone where the screen will automatically restore u can see white linings blink awhile.. just like those old tv when u on off got the linings..
i just did factory reset, i duno is this software problem or hardware problem but my colleague brought this phone to samsung service center, the fella ask my colleague to downgrade to 2.3.6 more stable

anyone know samsung service center around subang / pj area which their customer service is more reliable other than the sunway pyramid.. or anyone know how to resolve this issue?