Read NfcA MifareClassic NFC Tags

I have different tags:

• Amazon tag: NfcA http://www.amazon.de/gp/product/B00AESJ3B0/ref=oh_details_o00_s00_i00
• my key: NfcA
• some ad tag: NfcA, Ndef, MifareUltraLight

I want to read my key. UID is 20 66 be 52

, ATQA 00 40

SAK 00 08

(ATQA and SAK are the same as from Amazon key, so I think this is also Mifare Classic 1KB)

Whenever I try transceive(byte[])

, I catch TagLostException

. Fun fact: ad tag performs better, but still quitsIOException: Transceive failed

Trying to parse the tag (for my key) into IsoDep

or MifareClassic

produces a Nullpointer

. Only NfcA

works, but I can't read the data from the tag.

Can anyone provide my valid commands or any other way to read the content from Android.

MifareClassic mfc = MifareClassic.get(tagFromIntent);
mfc.connect(); //Nullpointer

      

        
        
        
      

    

EDIT: Looks like the problem might be with my Nexus 4 (mostly bought it for NFC :() doesn't seem to support the classic MIFARE tags. But if you still have ideas please post them.