I had had enough of the iphone 4?

I have an iPhone 4 & I don't like it. It freezes at random times & my home button only works when it feels like it. I had had enough and i was looking the android phones, are they good? Galaxy S 3 and N9770 MTK6577, which one is the best? I really want a new phone, so which phone is better than the iPhone 4?

Can't go wrong with a Galaxy S2 or S3. Both are better than iphone4.
I have a personal SGS2 and find it so much better than the employer provided iphone4.

Sounds like you got a lemon. Mine is fine. Why don't you take it back to where you bought it?