It can be cracked. After reading the information of NFC water card, the mobile phone can know the key, and then open the classic MIFARE tool to turn on the NFC function of the mobile phone. The water card is placed behind the mobile phone, mostly in the back middle, and can be cracked mainly by judging the contact position of the wireless charger. Dr. Ka Shuika is a super entrepreneurial platform: Dr. Ka owns150,000 enterprise data, covering all fields of industry, agriculture and service industry. Entrepreneurs can use the supply and demand relationship of the platform to realize their personal wealth dreams without funds and contacts.