You've probably noticed that companies like Walmart and Best Buy are still pushing iPhone 6 and 7. Well, people are buying them, not just the headphone jack. Strangely enough, you can thank Apple for the resilience of the iPhone.
Old iPhones were once premium devices
If you look at the iPhone 6, you can easily forget that it used to be a first-rate, innovative device. But just put on the 201
5 glasses for a minute. Check out the razor-sharp screen of the iPhone 6, the slim metal case and the 8 megapixel camera. It's like many of the cheap cell phones you find in stores today.
Apple has always designed its products with expensive, reliable parts (with some annoying exceptions). However, this strategy is in contrast to the usual smartphone market. Most people replace their phone after about three years, so phone manufacturers tend to cut corners or, if possible, use cheap parts.
As it turns out, Apple's commitment to premium parts is the main reason why the used iPhone market is so strong. Companies like Remade are making millions who are repairing and reselling old iPhones. The company focuses on iPhones (unlike Android phones) just because iPhones are "the strongest product with the longest life".
But here is the thing. You can fix old phones as often as you like, but they will not work if they are not running modern iOS. Apple forces all phones to iOS updates, and many apps (even native apps) do not work on phones with outdated firmware. Luckily, Apple is designing new iOS updates for old phones.
iOS updates on older iPhones work well after a claim