My current phone is almost 3.5 years old and I have no intention on upgrading anytime soon, but in the past I did tend to have to replace a phone about every two years. Mostly because POGO (and my being rough with them). Ports being damaged (and me not knowing how to repair them myself and others wanting to charge the cost of a new phone to repair it), being dropped, etc.
My current phone is almost 3.5 years old and I have no intention on upgrading anytime soon, but in the past I did tend to have to replace a phone about every two years. Mostly because POGO (and my being rough with them). Ports being damaged (and me not knowing how to repair them myself and others wanting to charge the cost of a new phone to repair it), being dropped, etc.