I've got a RFID reader from Adafruit.
When I poll a card I have it comes up with most things fine,
ISO/IEC 14443A (106 kbps) target:
ATQA (SENS_RES): xx xx
UID (NFCID1): xx xx xx xx
SAK (SEL_RES): xx
However when I use mfoc to try and brute force the keys it shoots up an error saying only mifare classic supported, I'm pretty sure the one I have is mifare classic.
Not to mention that currently, libnfc only works in debug mode.