I used to upgrade every year i stopped when the released the iPhone 7 but i tend to upgrade when a worthwhile feature becomes available
For example I kept my iPhone 6s till the iPhone 8 came out which offered wireless charging and fast charging now using an iPhone 12 and that was partly due to wanting a 5G device and more storage than my previous iPhone
Unless the phone stops receiving support for iOS the only upgrade i'll do is replacing the battery.
For example I kept my iPhone 6s till the iPhone 8 came out which offered wireless charging and fast charging now using an iPhone 12 and that was partly due to wanting a 5G device and more storage than my previous iPhone
Unless the phone stops receiving support for iOS the only upgrade i'll do is replacing the battery.