How do I update iOS 15.5 on iPhone 6s
How do I update iOS 15.5 on iPhone 6s
How do I update iOS 15.5 on iPhone 6s
You can update your iPhone to 15.6
Note that 15.5 is no longer offered.
See Update your iPhone, iPad, or iPod touch
How do I update iOS 15.5 on iPhone 6s