Can i know about this message which I mentioned below with screenshot? Is there have any kind of apple update or it’s fake?

This doesn't seem like a fake one though it is not from Apple Inc but from your Carrier.

You need to update Carrier Settings for your device to keep working.

Carrier Update (Required): Released by your Cellular Service provider (Carrier Update), affects your Outgoing / Incoming calls, SMS, Data etc..

How to Update Carrier Settings

You can manually check for and install a carrier settings, update with these steps: Make sure your device is connected to a Wi-Fi or cellular network. Tap Settings > General > About. If an update is available, you'll see an option to update your carrier settings.

Update your carrier settings on your iPhone or iPad - Apple Support