cell phone interface

i want to test that if my cellphone is responding to AT commands sent by AT89c51.
i have written a c program and before wirting this code to controller i want to confirm about the code. is it ok???? or i must correct it?? i am just sending AT and checking wether "OK" recieved and if so, led will be turned on!!!. can anyone help me out??
********************************
#include <reg51.h>
sbit led=P1^0;
void init()
{
TMOD=0x20;
TH1=0xFD;
SCON=0x50;
TR1=1;
}
void transmit(unsigned char *a)
{
while(*a!='\0')
{
SBUF=*a;
while(TI==0);
TI=0;
a++;
}
}
unsigned char rcv()
{
while(RI==0);
return SBUF;
}
void main()
{
unsigned char ok[2];
unsigned char j;
led=0;
init();
transmit("AT");
transmit(0x0d);
for(j=0;j<2;j++)
ok[j]=rcv();
if(ok[0]=='O'&&ok[1]=='K')
led=1;

}

no reply

no reply!!!!

abbas1707 said:

no reply!!!!

Click to expand...

It helps if you post in English, most people ignore the silly textspeak!.

Nigel Goodwin said:

It helps if you post in English, most people ignore the silly textspeak!.

Click to expand...

sorry i have edited.