I’m wondering if there’s an android app that would let one set the UID on the xM1+? Or can that only be done with a proxmark or something like that?
I have a Sony Xperia that seems to have the right NXP chip, it can read the xM1+ and get a memory dump etc from it using NFC Tools Pro, so I’m wondering if there’s an app that would let me write / change the UID?
Unfortunately no… the gen1 chip in the xM1+ requires a “magic command” that you send to the chip after the HALT command… this would require fundamental alterations to the Android source code NFC stack to get it working.