I want to reset/erase all data on my old Iphone x.
I have restored my new I Phone 13 Pro from the encrypted backup I made from my old I Phone on my MacBook Pro. The 13 works fine.
Now I have my old I Phone X that still has my data on it. How do I erase/reset the old phone without using Wifi, Apple ID, or I Cloud?
I don't want to trash out my I Cloud or my new I Phone13.
I might just put the I Phone in its' box and store it.
Ideas?