I want a new handphone!!!

I really need a new handphone! It's not becoz my hp now is too old to use...even i didn't care using the old one as long as it can be function well.But the problem is, my hp which i'm using now always turn off instantly when i got incoming calls,even though the battery is still full.This really made me tension and wanna replace it with a new one.That was my first hp which i bought the second hand one...and i think buy the second hand gadget is not worth at all.I aim to have sony ericsson w595 hp.It's cool and beautiful.Last week i went to kl and had a surveyed for the price.I thought the price in kl is cheaper than in KT..but i noticed that it's cheaper in Mydin,kt rather than in pertama complex in kl...btw,,i dunno whether the hp is original or not.how do i know the hp is ori or not?

w595 sony ericsson