The message tone of the mobile phone keeps ringing, but there is no message. What happened?

The message notification bar of the mobile phone is closed, and then when it comes back, the message will not be displayed, but there will be a prompt tone.

Because the mobile phone management software intercepts short messages, the short message number is intercepted in the blacklist of this software.

Solution: Open the mobile phone management software to check the interception information, or add this number to the white list to avoid being intercepted.

Due to the limited storage space of the SIM card, the remaining short messages in the SIM card will be stored in other places in the mobile phone, such as the SD memory card of the mobile phone, and the displayed short message folder is in the memory of the mobile phone, so the short messages stored in the SD card cannot be seen.

Solution: clear useless short messages to ensure sufficient storage space of SIM card;

Enter "Mobile Phone Settings", change the information storage location to a memory card, and increase the number of stored information.

Cell phone poisoning or malicious plug-in.

Solution: Use mobile phone management software to kill malicious plug-ins and Trojans.

The last way is to restore the factory settings, that is, format the phone.