iPhone 6 & iPhone 6 Plus
If you're looking for a new iPhone, but don't want to spend a ton of cash, you might be looking at the iPhone 6 and iPhone 6 Plus. They're still holding up pretty well in 2019, but they're in the same boat as the iPhone 5s.
Like the iPhone 5s, the iPhone 6 and iPhone 6 Plus will stick around on iOS 12. That means they won't get any new features and they won't get any more bug fixes or security updates from Apple.
You might be able to live without new features, iOS 12 is very good, but missing out on key bug fixes and security patches is a tough pill to swallow.
Current iPhone 6 and iPhone 6 Plus users should think about upgrading to a new device this year and those looking to upgrade to the iPhone 6 or iPhone 6 Plus should be looking at other devices. Good thing Apple has plenty to choose from.
The iPhone 6s and iPhone 6s Plus, the two phones that followed the iPhone 6 and iPhone 6 Plus, are also in great shape and both will get upgraded to iOS 13 in the fall. That means another year of software support before they're kicked to the curb. They've also got the better hardware.
Those devices will get iOS 13 and they should also get upgraded to iOS 14. The iPhone 8 and iPhone 8 Plus should get iOS 15 as well.
These devices also outperform the iPhone 6s and iPhone 6s Plus in terms of battery life, UI speed, and camera quality. The iPhone 7 and iPhone 8 are also much cheaper than they once were.
So while the iPhone 6 and iPhone 6 Plus might be tempting, you're better off spending some extra cash on a newer model. If only for the peace of mind.