Why Proxmark3 easy cannot read/write XSIID and XEM chips? but works to others, also I got an NFCA rings it can’t read/write it.
can you explain what exactly you’re doing and what commands you’re running
simple commands like hf/lf search etc. I can read/write in my phone but proxmark3 cannot detect my implanted chips. It can detect other chips.
I have same issue, phone and flipper reads NTAG 216 but PM3 don’t.
are you both positioning them on the correct antennas
In my case, I think yes 
NTAG216 on the bottom plate and RFID LF on rounded coil…
