So, I am very new at this (relatively)…
I had my xEM RFID chip implanted last year, it worked great, I used it to get access to a building I was working at instead of using an access card (chip was a clone of that card). I spent a month using it and I had no trouble at all.
Then I stopped using the chip as I was no longer working there, but now that I started working there again (8 months later) I tried to use the xEM implant, but it didn’t work.
I can still use the card from where the xEM was cloned, I should have access with the chip, but the problem is that it’s not an access problem, as the reader does not react when the xEM implant is close enough (last year it worked).
I have another NFC chip that works just fine (from the same date), and I have not even tried to modify the xEM, so It seems that it just stopped working.
Any suggestions on what might be happening?