CE numbers of the back of the iphone 6s
Hi everyone. Recently I've sold my old iphone 6s to someone else. At the moment this person i accusing me that because of number on the back CE 0682 that its fake phone because the oryginal 6s dont have it on the back, and this person is threats me that will go to police. I sold this phone on market place on facebook about 1 week ago. Can anyone help me with it, because for me its oryginal. This person is telling me that her friend's 6sphone have only CE on the back so mine is fake. I attached photos. Thank you for help
iPhone 6s