I've never had an issue with iphone dying. I used my first one (3Gs) for 3 years and it still works (kids use it for games but I don't have a service plan on it anymore). My husband and I have both had out iphone4s for nearly a year...no problems at all. Pretty much our entire extended family has iphones (several family members work for at&t) and I don't think any of us have ever had a phone die of old age.