I want to update my iPhone 11

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. 

darline161 wrote:

I want to update my iPhone 11

Can we assume you you were able to update your phone by following the details in the Apple support articles posted above?