Average lifespan of an iPhone 4s?

Not battery life, but life of the actual phone. Is it worth it?

Nope, androids are tho. They last a good 2 years. And more depending on how you use it.

Well I don't own an iPhone 4s but I do own an itouch 4 which has lasted me ever since and so far not caused any problem! And iPhone 4s is pretty good built. I guess it would last u a maximum of maybe 4 to 5 years: D (Jailbreaking can decrease lifespan since it slows down the OS and kinda f***s it up )