Is the WhatsApp missed call notification delayed

Solution 1: Turn off Do Not Disturb

If you are not getting notifications on iPhone, then first you should check if the "Do Not Disturb" option is turned on. As long as this option is activated, you will not receive any sort of notifications on your iPhone. So,

  • First of all look for the half-moon shaped icon on your status bar.

  • If that icon is visible on the status bar then the "Do Not Disturb" option is activated on your iPhone.

You will start receiving notifications again and this is the first solution you should try. If this doesn't help, go to the next step.

Solution 2: Allow Notifications for Apps

If after upgrading to a new iOS 13/12.4/12.3/12 , you are having trouble receiving notifications; you should go to the Settings of your iPhone, check and troubleshoot the Notifications menu. This should be your second option and this is how you can do it:

  • Go to Settings.

  • Navigate to Notifications.

  • Turn on the "Allow Notification" option, if it is not already turned on.

Now, if you are not getting any notification for a specific app, then,

  • Go to Settings

  • Tap on that specific app, like messages or mail.

Solution 3: Force Restart your iPhone/iPad

If you are faced with iOS 12 no notifications on lock screen problem, then you should look for some common solutions before you take the phone to the nearest service center. You can simply restart your iPhone or iPad and find out if the problem gets solved by itself or if you need to figure out something else. The force-restart process varies from models to models, and they are mentioned below:

Force Restart for iPhone 8 and X:
  • Tap and hold the Sleep button and the Volume Down button at the same time.

  • A few moments later the Slider will show up.

Force Restart for iPhone 7 and other models:
  • Press and hold the Sleep button and wait for the Slider to appear.
  • Move the Slider from left to right to shut down the iPhone.

In most cases, if you just restart your iPhone, the problem gets solved. I am not stating that this will definitely solve the problem but in similar situations restarting the iPhone has gotten rid of the problem for many.