The reasons why this card cannot be used abroad include insufficient available credit, insufficient additional card traffic, and the merchant POS does not support the use of passwords.

1. Insufficient available credit limit: International credit card limit includes RMB limit and foreign currency limit. When consuming foreign currency, you should refer to the available quota of foreign currency instead of directly converting the amount of foreign currency to be paid into RMB and refer to the available quota of RMB.

2. Insufficient flow of the supplementary card: When the total amount of deposits or overdrafts used by the supplementary card reaches the limit set by the user, the supplementary card will be repaid that month, and the flow is also limited and cannot be restored, and it needs to wait for the next bill. cycle recovery.

3. Merchant POS does not support the use of passwords: overseas card payments with signatures do not require password verification. Domestic bank cards are all set with passwords, making it impossible to make password-free payments overseas. Just change the POS consumption verification method to "signature" through mobile banking.