Hello please I may I upgrade iOS 12 to iOS 14

Hello ~Can you tell us your iPhone model? Take a look here:

Identify your iPhone model - Apple Support

It may be that your current iPhone cannot be updated any further but post back when you are sure of model.

~Katana-San~

~Katana-San~

Hello ~Your 6 plus cannot be updated past iOS 12. You require a newer iPhone.

~Katana-San~