The reserved mobile phone number of bank card can be changed on the mobile phone. The main methods are as follows: 1. You need to log in to the mobile bank to which the bank belongs, then find the reserved mobile phone number in your personal information, choose to change the account opening information and fill in a new mobile phone number, and then enter the SMS verification code to make changes; 2. You can also call the bank's customer service hotline, and then you need to choose manual service. After authentication, you can make changes according to the staff's reminder.

The difference between a bank card and a passbook: 1, and the difference in use: a bank card can set up multiple sub-accounts under this large account, and can also purchase wealth management, funds and other products; At the same time, you can also enjoy time deposits, demand deposits and other businesses. Passbooks are relatively simple. The passbook has only one corresponding account in the bank, and it is not supported to establish multiple sub-accounts. In addition, the passbook does not support foreign exchange deposits.

2. Difference in security level: In the process of withdrawal, the passbook can be withdrawn with password or without encryption, so the security factor is high. The bank card is different, because the bank card can use electronic payment, the withdrawal methods will be diversified, and the safety factor will be reduced. So generally speaking, the safety factor of passbook is higher than that of bank card;

3. Difference in service life: If the magnetism of a bank card is not destroyed or demagnetized, it can be used all the time, and there is no corresponding service life. Passbooks are easy to fold, which will also have a certain impact on the magnetic stripe. If the user's transaction frequency is too frequent, there will be more transaction records in the passbook and the time for changing the passbook will be longer.