How to update my iPhone to latest version?

GabrielAustin wrote:

please I need my phone to be updated now

Assuming you have a compatible device, 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 tag line says you have an iPhone X. You can update that phone to the latest release of iOS 16. You cannot update it to iOS 17.