Hello?
Are there any precautions when using the command AT+CFUN=1,1?
Turn on the power and reboot after checking the SIM, but the command does not work.
Help me 
Hi:
I don’t know which product of our company you use. Some of our products support AT+CFUN=1,1 , but a part of our products don’t.
If you execute AT command: AT+CFUN=1, is successful;but AT+CFUN=1,1 is no，That means your device may not support this command.
AT+CFUN=1 //Activate baseband and RF
AT+CFUN=1,1 //Restart the module and disconnect the serial port