I want to update my iPhone with my mobile data

Your iPhone X does not support 5G which is needed to update over cellular.

This link will show you how to update your iPhone, iPad, or iPod touch using WiFi -

Update your iPhone or iPad - Apple Support Update your iPhone or iPad - Apple Support

This link will show you how to update using your computer -

Update iOS on iPhone - Apple Support Update iOS on iPhone - Apple Support

"I want to update my iPhone with my mobile."

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Updating an iPhone X Through Cellular:

You Can't. So, overview my two User Tips:

• Computer:  Update your iPhone Using a Computer - User Tip
• Cellular: Use an iPhone 12 or later, that is using 5G, in order to update over Cellular - User Tip