MC60 SMS Recieve Problem

Hello !

Revision: MC60CAR01A10

I am having problems receiving SMS messages from the GSM module.
When the signal level rises to +CSQ: 31,0.
After several sms, the module stops receiving new messages. (No +CMTI: “SM”,X ) This happens systematically. At the same time, he can send a message and receive a call.
Can you guess what can cause this?

Dear Hw_engineer,
Thanks for your inquiry in Quectel forum.
Could you help to provide your test AT log to us to analyze the reason ? And whether you have check the module have received the message, and check whether the memory have no space to store the message. You can use the following command to check it. Thanks!