As for me, iPhones are the type of devices that won't start annoying you after 1.5-2 years of usage and you can easily use them for like 3-4 years even the previous 1-2 generations and they'll still work as fast and smooth
As for me, iPhones are the type of devices that won't start annoying you after 1.5-2 years of usage and you can easily use them for like 3-4 years even the previous 1-2 generations and they'll still work as fast and smooth