Hi,
I am trying to communicate with my nokia mobile 6610i using the code below and the TOPVIEW SIMULATOR. The problem I am facing is that after sending the AT\n\r command to the mobile my mobile does not give back the command's recognition

why am I not getting data from my mobile?

the code is

$mod51
MOV TMOD,#20H ;Timer 1 in Mode (Autoreload)
MOV SCON,#50H ;Serial communication in Mode 1 at 9600bps
MOV TL1,#0FDH
MOV TH1,#0FDH
SETB TR1

;transmitting AT\n\r to my mobile
MOV SBUF,#'A'
ACALL TRANS
MOV SBUF,#'T'
ACALL TRANS
MOV SBUF,#0DH
ACALL TRANS
MOV SBUF,#0AH
ACALL TRANS

;checking it recognition
REC: JNB RI,REC ; My program stucks here as I am not getting back data from my mobile.

LJMP WAIT

TRANS:
HERE: JNB TI,HERE
CLR TI
RET

WAIT: SJMP WAIT

END

Thanks