Question marked as Apple recommended User profile for user: David McKinlay David McKinlay User level: Level 7 22,245 points Jun 12, 2022 3:31 AM in response to chizark Your iPhone 6S can be upgraded to the current version of iOS - 15.5Go to Settings > General > Software UpdatePlug the iPhone into a power source and you can use either Wi-Fi or a computer. Show more Less Reply Link