Motorola. My Motorola smartphone I gave to my 4 year old too use as a music player when I got a newer one (would have kept using it if it wasn't running windows mobile). Its been dropped, thrown, stepped on, hit, bit, gotten wet in bed, etc. Still was working fine when he lost it. I bought a new battery when it was around three years old. My new motorla droid, I'd dropped while riding a bicycle, its car dock has fallen off the windshield and bounced across the floor of the truck, its been smashed in my pocket wrestling around the floor with the kids. They just keep on going.