nokia 3310-15-5-0 interfacing with 89s52

hello Is there any one who has done interfacin of 3310 with controller. I need some help.

I am able to send sms through 3315 but not able to recieve phone status

Below u can see the phone is sending ack but not the data after ack Code:

1f 0 10 4 0 4 0 1 0 1 1 e 1f 10 0 7f 1 71 1f 0 10 4 0 4 0 1 0 1 2 d 1f 10 0 7f 2 72 1f 0 10 4 0 4 0 1 0 1 3 c 1f 10 0 7f 3 73 1f 0 10 4 0 4 0 1 0 1 4 b 1f 10 0 7f 4 74 1f 0 10 4 0 4 0 1 0 1 5 a 1f 10 0 7f 5 75 1f 0 10 4 0 4 0 1 0 1 6 9 1f 10 0 7f 6 76 1f 0 10 4 0 4 0 1 0 1 7 8 1f 10 0 7f 7 77 1f 0 10 4 0 4 0 1 0 1 8 7 1f 10 0 7f 8 78 1f 0 10 4 0 4 0 1 0 1 9 6 1f 10 0 7f 9 79 1f 0 10 4 0 4 0 1 0 1 a 5 1f 10 0 7f a 7a 1f 0 10 4 0 4 0 1 0 1 b 4 1f 10 0 7f b 7b

i am sending right frame but i am not getting the reply from phone i am getting only ack

while with same program when i interface 3350 i got the reply in first try only. the interfacing hardware and the program is same nothing is changed.

Code:

1f 0 10 4 0 4 0 1 0 1 1 e 1f 10 0 7f 1 71 1f 10 0 4 0 9 1 8 0 2 1 4 63 2 4 5 6c 1f 0 10 7f 5 75 can any one give me hints on this.