SIM card doesn't respond after sending ATR

[rahulm]

sim card atr

Hi,

I'm working on a smart card interface driver that sends APDU commands to a SIM card
and receives data from the same. This interaction happens at ISO 7816-3 level. At the
moment, the driver resets the SIM card by sending RESET signal and the card responds
to the signal by sending following ATR:
3B 3F 11 00 80 69 AF 03 30 04 B4 01 00 00 0E 83 08 9F 16

After receiving ATR, I set clock frequency of the interface device accordingly and transmit
an APDU command. But my problem is:
I never ever receive response from the SIM card post ATR.

Unfortunately, there's no technical manual provided with the card. I've tried some random
commands used in other cards in vain. I was hoping that the card will at least respond with
"invalid class/command" status bytes. There's absolutely no response from the card
post ATR. I would really appreciate if anybody can provide insight into this.

Thanks,
Rahul

 

[M!k]

atr sim card

After receiving ATR, I set clock frequency of the interface device accordingly

what do you mean with "setting the clock frequency". There are only very rare occasions where you really change the frequency. Usually you do a PTS (protocol type selection) if this is shown in the ATR. Normally it's optional doing a PTS.
What exactly are you doing?

 

[Smart]

sim driver atr

Which kind of reader are you working with?
there is no requirements to change the frequency rate.