iMessage and FaceTime notifications remove and reinsert sim

Hi saji18,

If you'd like to resolve this iMessage error, these steps might help. 

It looks like you've had the chance to review If you can’t turn on or sign in to iMessage or FaceTime, but let's double-check the information in that link. 

Still not activated after a day?

It might take up to 24 hours to activate iMessage and FaceTime. If the issue continues after 24 hours, follow these steps:

1. Make sure that your device has the latest version of iOS or iPadOS.

2. If you're using an iPhone, contact your carrier to make sure that you can send and receive SMS messages.

3 .If your iPhone is used with a carrier not found in the wireless carrier articles, make sure you can send and receive international SMS.

4. Contact Apple Support.

We hope that helps with your question and take care!

Hi saji18,

To confirm, iMessage and FaceTime have fully activated with your phone number and Apple ID, correct?

Does restarting your device help stop this message you are seeing about your SIM card? Restart your iPhone - Apple Support Restarting can seem like it's a simple step, but it helps refresh the software which might help resolve unexpected issues.

Another step you can take is to ensure your device is fully updated, to see if that may help as well. You can check for an update in Settings > General > Software Update. If there is an available update, you'll want to backup before updating as seen in here: How to back up your iPhone, iPad, and iPod touch - Apple Support

This article also shows how to update with a computer if that is your preferred method: Update your iPhone, iPad, or iPod touch - Apple Support

Take care.