I am trying to use JSR177-APDU in order to interact with the applet on the SE and is always getting -1 (0xFF) as the slot number in the externalReaderDetected(byte slot) event. What is the correct slot number to access SE over JSR 177?

The device that I am using is Nokia 6212 NFC.

Many thanks in anticipation for your reply.

PS: I have posted here, but re-posting here as the other post was originally for 6131.