Update your iPhone to iOS 14.2 right now if you want to keep it secure

Apple issues warning to iPhone users about iOS 14 – see if you're impacted

Did your iOS update fail? Here’s how to troubleshoot - 9to5Mac

Install iOS 16.4 beta on iPhone - 9to5Mac

Download iOS 15.8.3 / iPadOS 15.8.3 Final IPSW Offline Installer [Direct Links]

Download and run Launcher iOS 15 For Android on PC & Mac (Emulator)

How to download apps from the Mac App Store

How to get apps for old iPhones and iPads | AppleInsider

How to download prior versions of apps onto an older iPhone or iPad that can't run iOS 12 | AppleInsider