At what age should you have an iPhone 6?

At what age should you have an iPhone 6? - 1

At whatever age your parents feel you can be responsible with one.

if you are the parent, maybe in high school when they get a car /or drivers license. I think a basic cell phone is fine for any high school age, until they start driving on their own and get good grades.

consider getting a non-contract plan, like the Verizon's Edge plan. That's what I'm on, it's a family plan, but what they do is you pay the full retail price of the phone, plus data, month to month, and they split it in 20 month payments for the phone. When you pay half of it, or wait six months, you can upgrade to another phone if you wish with out waiting every two years.

16, because you should have a job by then.

When you need it and can pay for it

It depends on your maturity and needs. I wouldn't recommend buying/allowing an iPhone 6 to anyone under 13. If they really need an iPhone they can have a secondhand one or a 5c.