If notifications are not working on an iPhone, the issue is usually caused by incorrect settings or system restrictions. First, check that notifications are enabled for each app in Settings and ensure Focus or Do Not Disturb modes are turned off. Verify that Background App Refresh is active and that the device has a stable internet connection. Restarting the phone or updating to the latest iOS version can resolve software glitches. Also confirm that notification previews are allowed and that the app is not restricted by battery-saving settings. If problems persist, resetting all settings can restore proper notification behavior without deleting personal data.

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