So i have the xnt and it wouldn’t let me write to it for some reason anymore. Kept throwing back an error so I did a factory reset to it like it told me too and now it won’t ever read it. Android says its an unsupported tag type and then it gives me an error saying invalid tag. Nxt tag reader allows me to scan it successfully and it shows I still have my data on it but for some reason it doesn’t have a tag type. How can i fix this.
Update: it seems that it has two different messages on it. One blank one and one with the OG information. How can i get rid of one of them.
chances are that the OG message was larger and what you’re seeing is the new message, which is smaller, then the ndef terminator TLF which is FE , then remnants of an older message which was larger and written to more memory pages beyond the current message.
you can try to do a full scan with taginfo and post the memory contents (minus UID if you’re security conscious)
… or you can use the Dangerous Things Support Tool and write a blank ndef record and then try to write a new record overtop of that.
If nothing else has worked ,
and you dont have a Proxmark, and nobody else here has any ideas,
(Since Amal already has your details)
Rather than a DM to Amal, if you use the support tool on the DT website, by hitting the floaty orange help button
Yes. I have an android. It just says can’t read chip type and gives me the invalid card error. My computer can still read it when I go to unlock my pc with it but all its doing is typing in the uid.
Ok you will need to use the proxmark3 when it arrives to investigate what’s going on with the tag memory that might be causing the Android NFC stack to bail on reading or writing it.
I was finally able to get a proxmark3. I ended up buying it from your website actually but I cant seem to read the tag. Could you walk me through reading this type of tag in case I’m doing something wrong. It says
[!] iso14443a card select failed
[!] No Ultraligth / NTAG based tag found
