Well my brother has a K750 for 1.5 years now,
my other brother had a K700I for 2 years but lost it
he also had a T610 for 2 years, then I had it for a year, it still works..
And I had another, don't know the name, and that one also still worked after 2 years..
My 1630's screen stopped lighting up after about a year. Its fun to write SMSs when you can't see what you're writing
Samsung is my now. The d600 is pretty nice. Oh, and my 930BF monitor is pure canned addiction!