Unable to Verify Update iOS 15.5 on iPhone 7 Plus

You must have a stable Wi-Fi connection.

Or connect to a PC with the latest version of iTunes installed.

Charge the battery to 50% or higher.

Turn off Battery saving mode.

Don't use a Hotspot.

Don't use VPN.

And make sure you have enough free space.

Try a Force Restart of your iPhone 7 Plus. Press and hold both the volume down button and the Sleep/Wake button at the same time. When the Apple logo appears, release both buttons.



If 'Retry' doesn't work, try restarting your iPhone, and turning off, then on, the Wi-Fi.