How can I update my software

iPhone 6 is an outdated iPhone it can’t be update to a higher iOS (13 and later).

The last security updates iOS 12.5.6 -> released September 12, 2022,available for iPhone 6.

Yes, most apps require iOS 13 or later.                                

Considering a newer type of iPhone?

Read this before you buy a newer iPhone.

See :

Apple Store -> iPhone - Buying iPhone - Apple

Apple Certified Refurbished -> Refurbished iPhone Deals - Apple