The iPhone 6S and 6S Plus arrived in September 2015 running iOS 9.
The iPhone 6S will turn six years old this September, an eternity in phone years. If you’ve managed to hold onto one this long, then Apple has some good news for you — your phone will be eligible for the iOS 15 upgrade when it arrives for the public this fall. The iPhone 6S, 6S Plus, and first-generation iPhone SE, which all shipped with iOS 9, will be among the oldest devices to receive the OS update.
Six years is an awfully long life span for a mobile device, and certainly puts the 6S in the running for the longest supported phone to date. The iPhone 5S was five years old when it got its last OS update with iOS 12 but wasn’t eligible for iOS 13. On the Android side, Samsung has made recent moves to improve its device longevity by…