Ios 13.4 update
how to update ios 13.4
iPhone 6, iOS 12
It is not possible, iPhone 6 is an outdated iPhone (9 september 2014), can’t be update to iOS 13.4
iOS 12.5.6 is last security updates for iPhone 6 -> released August 31, 2022.
Go to Settings -> General -> Software Update -> Download and Install.
Yes, most apps require iOS 13 or later.
Considering a newer type of iPhone?
Before buying a new iPhone read:
The All Too Common SAD Reality of Buying a Used iPad/iPhone
The All Too Common SAD Reality of Buying … - Apple Community
Apple Store -> iPhone - Buying iPhone - Apple
Apple Certified Refurbished
Refurbished iPhone - iPhone 12 Pro - Apple