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If you're running Android on a Samsung Galaxy smartphone, open the Settings app, scroll down, and tap on Lock screen. Next, tap on Notifications and not the switch next to it. To hide the message content in the Notification bar, make sure the Hide content switch is turned on.

Scroll down to and tap "Notifications." This will open a long list of every app on your phone that generates notifications.Open your Notifications settings page.You can tap on an app to change its specific notification settings.Tap "info."Toggle "Hide Alerts" on.Toggle on "Filter Unknown Senders."

How enable or disable notificationsLaunch the Settings app on your iPhone or iPad.Tap Notifications.Select the app you want to remove from Notification Center.Toggle the Allow Notifications switch on or off.

Step 1: Launch the Settings app and select Messenger. Step 2: Tap Show Previews and choose Never. Step 3: Now, all future notification previews should be hidden from the Lock screen; see the example below.

To hide sensitive notifications from prying eyes on iPhone or Android, you can make your notifications just say notification instead of showing the actual notification content....To do so,Go to Settings > Notifications.Tap the desired app.Tap On the lock screen.Now select Hide sensitive notification content.

Cause of Notifications Not Showing up on AndroidDo Not Disturb or Airplane Mode is turned on. Either system or app notifications are disabled. Power or data settings are preventing apps from retrieving notification alerts. Outdated apps or OS software can cause apps to freeze or crash and not deliver notifications.

Android proposes several types of notifications to inform the user:the notifications in the system bar.the sound notifications.the notifications by vibration.the notifications by switching the LED on.the use of "Toast" messages.Versions 19 and later. the push notifications. New in version 19. the push notifications.