Why doesn't the 'Erase Content and Settings' function work on the iPhone 6s?
I recently bought a used iPhone 6s. It turns out that the previous owner of the smartphone was unable to delete the data from the iPhone and some of their data is showing up for me. How can I delete all the data from the phone and make it like new if I don't have a computer and the 'Erase Content and Settings' function doesn't work?"
iPhone 6s, iOS 15