along with my 6212 classic NFC there came three tags colored yellow, green and gray. Obviously. the are used in the built-in NFC demo and contain a wake time or a date for my personal calendar and alike.
In many ways, these tags behave like Mifare 1k tags. So, I take them for just that.
Now, I want to read (and possibly write) these tags with an external reader device. It tells me, that I'm not authorized to do so. From the Mifare doc I know, that I need key A or B (or both) to access secured areas of the tag memory.
As I can modify the content of these tags using the 6212 device, I guess at least the phone must know these keys. Possibly, they are hard-wired there. But possibly they are known to the public.
Does anybody of you know of these keys?