I am trying to work with NFC on my Nokia Lumia 820. I want to read the UID of my device using a Smart Card Reader.
Does anyone know if it's possible to get the UID of the device with this kind of reader? Each time I use the ACR122U reader together with my Lumia, the indicator light blinks in green.
I wonder why this connection can't be established?
And I heared that the UID of the Nokia Lumia 820 chance every time. Is this correct?

Kind regards