pleas help me…
i am also facing same problem … I have tested the code in pc hyperterminal for both send &Receive SMS through GSM SIM 300 with PIC 16F877a Micro controller through MAX 232 but when i connect GSm SIM 300 with PIC 16F877a Micro controller its not supporting so without connecting MAX 232 its working only for (I can transmit character) SEND ing Message and daling the call but its not receiving any thing..without using MAX 232 what is the problem…