hey bro, my case was same with u, last time when i buy my s2g, 2 week will keep sod, 1 day sod about 10 times, i feel like wtf is this, when i buy s2g is RM2.2k, is a lot for me too, then i sent in to service center about 4 or 5 time, at last i get a new phone, their service is like this, make ppl feel frustrated, but wat can i say, buy phone really consider luck, few of my friend get the same phone but they didnt have this kind of problem

Ya, i change 2 mainboard and the problem still the same, i sent to service center about 5 time if not mistake, at last i cannot tahan, so i back to the samsung shop that i buy my s2g, i request to change a new one, after they check the record, they change for me in 2 day