1) There are many reasons to get a new phone, the biggest one is battery life, after a few years your phone will not last as long as when you bought it. Also a

1) There are many reasons to get a new phone, the biggest one is battery life, after a few years your phone will not last as long as when you bought it. Also a smaller reason are security updates, since they are quite needed due to the increased processing power available. This also depends on where the market goes, because pretty much all phone manufacturers follow Apple's lead to some extent. Removing the headphone jack, the notch and curved screen corners, and the non-replaceable battery are all features that Apple popularised. So it may not be possible to get a phone without these features any more in the future.