Hi. Tags sold for me as t5577. Need to change block 3 and block 4 but seems to be it cannot be changed still all zeros after making changes. what is the problem ?
Tried to wipe but it doesn’t help Proxmark3 easy
Sometimes crappy sellers will sell you t5577 that only have blocks 0-1-2 meaning you can only fit certain encoding formats on them. This seems to be the case with you, I recommend returning them