I want update my iphone

Hello ~ It is always best to post and wait for a fellow user to help you and not keep reposting. Take look here:

Update your iPhone, iPad, or iPod touch - Apple Support

~Katana-San~

Your iPhone is old and obsolete by todays standards.

Take a look at Apple’s latest iPhones here. 

Hello ~ Also take look here as the iPhone shown in not an XR

Identify your iPhone model - Apple Support

~Katana-San~

Go to settings general click software and chose update.