I’ve read every article imaginable and tried all the passwords I could find online (as well as running lf t55xx chk with the proxmark dictionary of passwords) with no luck. Does anyone have any idea on how I could unlock them? I’ve tried wiping them in test mode, re-writing them as EM chips but nothing works.
The seller told me I had to use one of these devices (which was not clear on the ad):
I think you’re right, now that I’ve tried pretty much everything I’m pretty confident they just sent me EM4100 chips instead of the EM4305/T5577 I ordered. Very annoying for my first proxmark experience lol but a good learning opportunity! Thanks all!