Passcode unknown.
Hi, my grandma got an iphone 7 from her friend about a year ago. She doesn’t normally use a passcode on it, but this morning she woke up and it looked like the phone had been reset. All of her calls were showing up as numbers instead of contacts, ones that she definitely had in her phone. The screen was asking her for a 6 digit passcode that she doesn’t usually have to use. She didn’t reset the phone, it just automatically updated. She doesn’t know the passcode, meaning she can’t get into her phone. What should she do?
iPhone 7