https://www.techradar.com/news/apple-drops-two-generations-of-iphone-from-its-ios-13-compatibility

The next generation of software for your iPhone has been announced at WWDC 2019, but those still clutching onto older devices may be out of luck when it comes to snagging an iOS 13 update.

Apple has confirmed that iOS 13 will be compatible with the iPhone 6S and above, which means two generations of handsets which got iOS 12 won't be in line for the next upgrade later this year, spelling the end of their core support from the technology giant.