I have a reader that is used for door access control in my lab. When I place the Nokia 6131 NFC phone close to the reader, the reader is able to detect the phone and a 6 digit number is displayed on the screen of the reader. However, these digits are not the same as the card UID of the phone. My question is where will this 6 digit number be stored on the phone? Is there a way in which I can read these 6 digits and display it on my phone. the phone uid is shown as XXXX9000 and the number read by the reader when I place my phone near it is XX2368.