If your bank card has SMS service, there will be SMS reminder if it is frozen. If not, there will be no SMS reminder. You need to go to the bank with your bank card to unfreeze it. That is, according to the freezing reason, I hold my ID card and bank card to go to the bank counter to handle the related unfreezing business.
The bank card may be frozen because of abnormal credit card transactions, such as malicious cashing, forged information, and consecutive password errors. And the bank card may be frozen by the bank.