How does the access control system identified by the mobile phone work?
Just different is that the general card reader can not read the phone card, so need to be equipped with a dedicated card reader as long as the information read the controller that piece is not a problem.
They are not right, in fact, mobile phone access control system is mainly mobile phone card and ordinary phone card is not the same, this card to the general access control ID card IC card integrated in the phone's SIM card, to use this card To identify the access control must change the phone card, and to the mobile business hall for "wing machine" business, he will give you a new SIM card, and you now use the phone number to write this new SIM card inside. It is possible to change the phone .189 at the beginning of the phone have this feature.
Very simple ah, that is, with the SIM card reader on the line
