Every month. Sim not register. How to automatically send AT+QPRTPARTA=3

Every month I get the error “sim is not registered”. If I run AT=QPRTPARA=3, its fixed. I am looking for an automated method of sending this command once a month.

Does anyone have a suggestion on how to do this?

The crond script can be added to openwrt. In general, you can use the following command to send the AT command.

gl_modem AT "AT+QPRTPARA=3"

This command will vary slightly depending on the model. What model do you use?

I am using the Spitz GL-X750V2.