Default Ugh. So confused.

So I was under the impression that NFC tags could be written and read by all devices. I bought Mini S20 PVC Cards from buynfctags and, if I could post the picture I would show you what my phone reads them as. But it says: "MifareClassic, NfcA, NDEFFormattable is what my phone reads them as. Went to write them on my HTC EVO 4G LTE and I keep getting errors saying it cannot write on the card. Really upsetting. Anyone know what I Can do???