For posts that depict the contents of a cellphone's screen, without the cellphone being visible, with the exception of a phone being visible within a selfie or other photo being shown on a phone screen.

This can also apply to images that are entirely composed of a text message conversation, a video recorded with a phone, or picture taken with a phone (and has user interface elements typical of a cellphone's camera). If the cellphone itself is visible, use the cellphone and/or smartphone tag instead of phone_screen.