hello again I found this a litle piece of info that show how to make a lector RFID with a phone (if some one want to make) and more
http://meag.tele.pw.edu.pl/pubs/pdf/...Box-Thesis.pdf
and this magazzine (if you dont want to make a lector RFID with a phone) but with a little material no expensive and with another info to
http://down.jdgcs.org/file/download/...70ACE51F6570F/

Best Regards all of you