If you cannot pay the phone bill, you first need to check whether the billing party supports credit card payment. Not all merchants or websites that can pay by card support credit card payment, and some may only support debit card payment.

If the charging party supports it but the card cannot be used for payment, there are many possibilities. For example, if the credit limit is insufficient, it cannot be used. If the credit limit is sufficient, it may be a problem with the merchant's card swiping network or improper operation. You can try another merchant. In addition, abnormal card status will also affect use. You can call the credit card customer service hotline to check whether the card status is normal. Sometimes the card will be locked if the card is swiped incorrectly, or if the password is entered incorrectly several times in a row, the card will be locked. Customer service can help you unlock it. If there are no problems after checking, it may be that the chip or magnetic strip is damaged. The chip is relatively durable and rarely breaks after use. If it is determined that the card cannot be used due to damage, customer service can help you replace the card. After receiving the new card, it can be reactivated and you can continue to use it.