According to Apple, iPhone models as late as the iPhone 6 Plus will become obsolete. They are also known as “old iPhones”, as they indicate that Apple stopped selling them more than five and less than seven years ago. More and more consumers are opting for refurbished devices that are up to 40% cheaper, such as this refurbished iPhone 13 or this iPhone 12 Pro. If the next release of iPhone models is going to make your iPhone model obsolete, there are a few things to keep in mind.
Apple will support iPhones (and all the devices it makes) for seven years starting from the last time it sold that particular model. This suggests that while the iPhone 6s may receive software support for a while, it may not be possible to repair it if it breaks. Statista (a provider of market and consumer data) publishes a graph showing how long Apple has been compatible with older iPhones.