Hey guys… so… I’ve been playing around myself trying to fix this because apparently NXP isn’t going to fix their TagWriter app to properly format the tag. There are missing TLVs (the 00s in pages 04, 05, and first bit of 06)… those define memory boundaries etc. and should be written as;
A20401037818
A2057702037B
A2067507
Now, if you are wanting to format the tag so it has a blank NDEF message, then the full data would be;
A20401037818
A2057702037B
A20675070304
A207D8000000
A208FE000000
… now… this doesn’t solve shit with TagWriter or NFC Tools, but it is the proper way these tags should be programmed, so I am updating my production process to use these TLVs. The next phase is to just make an Android app that fucking works… iOS 14 TagWriter doesn’t work either… so I went digging with the Proxmark3 … more study is needed but I am totally pissed off and we will sort this out one way or the other.
@hoker … once I get the proper stuff figured out, it might be time to join forces… I don’t have time to write up an Android app update / fix for this, but it appears we are going to have to do this ourselves… I think it might be time to open source the Dangerous NFC app (no idea why it wasn’t before, but whatever) and see about adding some of these woefully lacking features for specific products like the xSIID. You game?