mifare sector read only

[lorenzo_poliba]

Hi,I am using MIFARE CLASSIC EV1 for my vending machines but I can't write to sector 3 because it is read only. I have already made sure that the keys are correct.

how can I write to it? Thanks.

[lorenzo_newprofile]

Ciao Giulio, il mio vecchio account è stato sospeso per inattività, sentiamoci su telegram, il mio username è: @genio0789

[Jonathan_Iglesias]

Hi  ,

unfortunately if you set the sector trailer to this,  there is no way to modify it, since you set the Key A or B can only be used to read, please be careful with this and  this is very strange  because when a key is being used  when you read the trailer it should return 0s.

and I see the card is answering with the key values, can you share more information of where you got the cards and  things like that ? please send me a direct message.

Have a great day !

BR

Jonathan