Had a straight swap with this guy:
My Samsung Galaxy S3 with his Iphone 4S.

I was not happy with his product as there is signal issue. I have come to know this in less than 24 hours but he is hesitant to return exchange our product. We have tried many possible solution to solve the signal issue but to no avail. I really wanted him to return my S3 but he said he sold it already. So now, here, I am stuck with his problematic iphone 4s. I was so unfortunate to transact with this guy.

BEWARE of the products coming from this guy.