problem is sending sms with 8051 by siemens C55

ajay I have tried your suggestion.But I am failed.Cell phone doesnt give me anything.Where is my mistake plsease help me

problem can be in micro-mobile connection.can't say more about it

my schematic and my codes are correct?

try to send only 1 command..like atd , tell about response you get

Have you tried with the external pullup?

I gave you two suggestions which one you tried?
replacing ok with OK?

try abbas's suggestion too.. no need to wait for OK.. just try sending AT commands.

ajay I havent anytime to do it.Have you any projects that is finished about it.please help me.I have many class too.I havent more times
please help me.

edit your main for a while and replace it with this

void main()
{
	P2_0=0;
	P2_1=0;
	while(1) {
		if(P1_0==0) {
			init();
			sendString("AT");
			sendChar(0x0D);
			sendString("ATE0");
			sendChar(0x0D);
			P2_0=1;
			sendString("AT+CMGS=19");
			sendChar(0x0D);
			P2_1=1;
			sendString("079109459208003311000C910945664173350000AA05E8329BFD06");
			//sms center no:+905429800033, destination number:+905466143753, message:"HELLO"
			sendChar(0x1A);
			sendChar(0x0D);
		}
	}
}

comment the function which you are not using...
like checkOK and all.. then try on controller again.

waiting for response.

just I will change my main function?and but in main functiom havent delay when transmitting at commands

I didnt understand external puul-up.I know just need when we use P0 port.we have to use external pull up.for P2 port doesnt need external pull up ,doesnt
it?