Unable to read an SMS from Sim900a

Question

I have interface PIC16f877A with sim900a directly. I can send SMS but in case of Receving/Reading an SMS from sim900a I am failing.

I am unable to find the error, has anyone had a similar experience?

Answer 1

Are the indicators for receiving an SMS message set correctly in the modem? Ensure:

AT+CNMI=1,1,0,0,0