How to update iPhone 7 software

It shows you in your screenshot what the problem is.

• You need a WiFi connection.

• You also need to charge your phone to at least 50%, better yet, leave the charger plugged In.

• And you need to turn off Low Power Mode to perform the update.

In order to update to iOS 15.7.8,

-You need an internet connection

-Your phone needs to be connected to a power source or to be on 50% or higher.

-You also need to turn off low power mode.

Hope this helped! 😄

(If a problem with the update still occurs, then contact Apple for assistance.)

Have a nice day!