My mobile phone has a short message sound. Why don't I see anything on my mobile phone?

Reply to the post of #1 azrael99999. Did you install a security housekeeper or a 36 security guard? = = Then you turned on the interception system. = = Some short messages may be information desks or other short messages. In short, short messages from people you know will enter the interception system. There is a sound but it doesn't show. Turn on your security system software and you can see it when you turn on the interception system.