My personal experience is that the phones are built to last. My iPhone 3G is now 4 years old, and receives heavy daily use from my 15yo daughter. The battery ru

My personal experience is that the phones are built to last. My iPhone 3G is now 4 years old, and receives heavy daily use from my 15yo daughter. The battery runs all day - it's still totally reliable and doing good service. That's more than I'd expect from a phone after 4 years.