How to reset iPhone SE with no computer...

I'm asking this for a friend who is snowed in and in a power outage in Spokane...

For some unknown reason, her iPhone SE (orig) greeted with the Hello/Ola screen (as when new), but it's also asking for a 4-digit numerical password. When she inputs the number the phone buzzes and tells her to retry. Of course the phone keeps rejecting her --because she keeps inputting in the same digits-- and the increasing the intervals between allowed attempts. Because she is in the middle of a 4 day power outage she can't use the computer.

Is there any way she can reset/restore the phone without the use of a computer? Remember, she cannot access her Settings/Preferences screens (or any other screens). No computer, no Find My Phone, nothing...

Thanks...