I’m with family for the holidays and thus haven’t been able to try with a proxmark, but using my flipper zero (the NFC Magic app > check magic tag > write) I tried to rewrite my flexUG4 from my apartment key to a website link to show off to my family. That write failed, but not before removing my original apartment key, and now I can’t seem to write anything to it, or even wipe it
Trying to write, wipe, or read the chip takes a long time as the flipper shows a loading bar for unlocking sectors 1-5, but only ever reports 2/10 keys found, and 1/5 sectors read, and afterwards, reads just say it’s “ISO14443-3A (unknown) UID: 11 22 33 44”
Is it bricked? Is there something I’m missing? Will a proxmark be able to save me where my flipper is failing (when I get home)?
What transponder is it you tried to write to it? I would be very surprised if it were bricked. Probably just failed to write the proper config. Do you have a proxmark?
The apartment key, which was on there for weeks beforehand, is a Mifare classic 1k. This problem began when I tried to switch it to an NTAG216. I do own a proxmark, but don’t have access to it until I get back from vacation on Sunday. I’ve tried the write, as well as reading and wiping, several times and they all fail
I have had some messed up UG4s that I have been able to reset with a proxmark. I haven’t used the flipper for this much. The proxmark script is pretty great.
I’ve basically only been using the NFC Magic app. I used NFC (basic) for the reads, but the writes and wipes are all through NFC Magic
It is the version that came with the Momentum firmware though, so I’m unsure if it’s version or if it’s entirely working right, there’s a few apps that have bugs with that firmware, but I did use it to write the apartment key weeks ago with no issues