iPhone does not connect to a computer, iTunes, Finder, or Apple Devices

Request I connected my iPhone to a computer, but it does not appear in iTunes, Finder, the Apple Devices app, or File Explorer. I need to back it up, sync it, move photos, or update it. Start by choosing the right app. This is where many old iTunes guides are now misleading. On a current Mac, use Finder to see and sync the iPhone. On a Windows PC, use Apple Devices or iTunes, depending on what is installed and supported on that PC. If you only need photos, File Explorer or the Photos app may be enough, but the phone still needs to trust the computer. Phone Link is for Windows notifications, calls, messages, and continuity features; it is not the same thing as a full local iPhone backup/sync tool. Apple’s current support split is simple: Finder on newer macOS, iTunes on older macOS or some Windows setups, and Apple Devices as the modern Windows device-management app. If the guide you are following says “just open iTunes” without checking your computer first, slow down. ...