1. Judging from appearance
2. Judging from NFC induction of mobile phone
The mobile phone opens the NFC and places the card on the sensing area. The corresponding representative is the IC card. If there is no response, it is other types of cards.
Mobile phones are the most inaccurate. This method is only used when mobile phones are used.
3. Judging from the card reader
Take NFC Reader Tool as an example. One response is an IC card, two responses are ID cards, and three responses are IC+ID composite cards.
4. Exceptions
The frequency offset card/frequency conversion card of ID, such as 175, 250, 300, 375 and 500kHz frequency, cannot be sensed by the machine; Its appearance may have frequency labels.
The T5577 (encryption) machine in the ID card cannot be detected, and cannot be copied and cracked; Only pure unused T5577 can be copied and written.
The 14443-B standard card in the IC card cannot be read and modified. This type of card is often seen in ID cards, financial cards, payment cards, etc.
