If we're talking anecdotes, my wife changes her iPhone every 4 years because it gets worse and worse. Daughter does the same. I change my Galaxy every 4 years because it gets worse and worse as well. Not sure how some people can say their <insert beloved brand> holds forever, unless they don't really use it of course. No brand really keeps up with the requirements, unless all you do is make phone calls - which is why my dad still has a Sony Ericsson.