Why does iPhones' have a lot of problems?

My dad wanted an iPhone but I herd it had a lot of problems that it won't' last long enough how can I explain this to my dad?

No phone is made perfect. A certain percentage of all phones made have a manufacturing defect and it's just luck of the draw really. You hear more about iPhones though because they are so popular and almost always seem to have the same fault - no signal or whatever. They usually last a good two year providing you don't damage it. Parents generally think they know better than their kids (mostly) and he will most likely disregard what you say and get one anyway!

IPhone's have no problems.
I have an iPhone and I haven't had any trouble with it.

I guess it just depends on the coverage. But iPhones do have alot of restrictions.

You have a lot of problems. A phone is just a phone

Because the technology behind iPhone is rather older in comparison of other mobile makers like Samsung or HTC.