to be frank, apple is considered quite sincere in this area. despite the premium paid, one can easily use an iphone for more than 5 years. it is actually worth every single cent that you have paid for the phone.

best thing is a phone, u can at least 5 years of software upgrade, it is incredible.

comparing to any android, you may not even get more than two times of software upgrade and the phone may not even last more than 2 to 3 years.