Because mobile phones or bracelets can only simulate non-encrypted cards, we use mobile phones or bracelets to simulate our access cards, and we use the functions of mobile phones or bracelets to simulate them. If the simulation can be successful, then the access card is an unencrypted card. If you use your mobile phone or bracelet to simulate without prompting that there is no encryption, it may be the following situations: 1, and the mobile phone does not respond to reading cards: this situation shows that your access card is an ID card, and the mobile phone only supports analog IC cards. If your access card is an ID card, you can't use your mobile phone to simulate it (remember to read it several times with your mobile phone); 2. The mobile phone prompt card does not support emulation: this is because your access card is not the standard M 1 card, and this prompt will appear on general bus cards, bank cards or cards with stored value function (remember to watch it several times with your mobile phone); 3, mobile phone prompt card encryption: this situation shows that your card is encrypted M 1 card, most access cards, elevator cards, membership cards are in this situation, this card needs to be cracked to get the password to simulate.