I need to update my iPhone X

To update to the most recent, compatible version of iOS, please see: Update your iPhone, iPad, or iPod touch - Apple Support

And: If your iPhone, iPad, or iPod touch won't update - Apple Support

If the above Apple articles do not help, please post back with relevant information. 

saifuddin163 wrote:

I need to update software

To update to the most recent, compatible version of iOS, please see: Update your iPhone, iPad, or iPod touch - Apple Support

And: If your iPhone, iPad, or iPod touch won't update - Apple Support

If the above Apple articles do not help, please post back with relevant information. 

Your profile states that you have an iPhone X with iOS 16 installed.

Open Settings ➡️ General ➡️ About: Here, if you see that iOS version 16.7.3 is installed then you cannot update your iPhone X any further.

Axel F.

The iPhone X can be updated to iOS 16.7.3, no further. If this is not the issue, please post back with relevant details.