iOS 11's not-so-ruthless execution: Older iPhones and apps won't work anymore | Mint
Discussion] Successfully downgraded iPhone 6 to iOS 11.4! Big thanks to u/DoggoFox123 aka Mineek (sunst0rm tool). I am open for any questions! : r/jailbreak
Apple iPhone 6s - iOS 11 - Kena Mobile
Apple will release iOS 11 for iPhone, iPad on September 19 | ZDNET