A prime example is Activation Lock -- it's mentioned during setup on Apple devices, but often never referenced again until it becomes a problem. Here's what you need to know about how it works.

The iMessage service relies on Apple’s servers to function properly, and if there are outages or maintenance occurring, it can cause activation errors for users.

To complete removing Activation Lock, return to a Find My app or iCloud.com and remove the device from your Apple ID-associated hardware: iOS/iPadOS: Go to Settings > Account Name > Device Name ...