Let's see..

Motorola (can't remember what model but it was very basic, just for calling, if I recall right)
Nokia 1610
Nokia 3210
Nokia 3310
Nokia 6100
Nokia 5140
Siemens M65
Nokia 6131

That's about it from 12-15 years. If you'd ask my favorite one from that list it'd be the 6131. It should still function, even though it's close to 4-5 years old now. Too bad though that I lost it, since it'd be a great secondary phone.

Though in future that list won't have any Nokia's, thanks to Elop.