The beautifully designed knock-off phones have recently been found to have a "greedy" fault - "once the built-in phone games are opened, there is SP (telecommunication value-added service provider) information," "when changing phone ringtones, actually received SP text message replies, one text message cost 2 yuan"... Recently, many users of knock-off phones have posted on various network forums to complain about their experience of being mysteriously "robbed" by the knock-off phones.