Confirm Find My Is Turned On in Settings
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Open the Settings app and tap your name at the very top of the screen. Tap Find My, then tap Find My iPhone. The toggle next to Find My iPhone should be green. If it isn't, tap it to turn it on.
While you're on this screen, check that Share My Location is also toggled green. That second toggle is what lets you send your location to other people - the first one is just so Apple's network can find your phone if it's lost.
Tip
If anyone already shares with you, their names appear under FRIENDS on this same screen. You can tap a name to manage what they see.

















