The transaction reminder should be the balance change. Bank of Communications' balance change reminder is not free and requires a fee. You can go to the counter or online banking to handle it.

1. First register on the Pay Bar and bind your own credit card.

2. Then open the home page of the payment bar and click "Card Life" in the lower right corner, as shown in the picture below.

3. Then click "Card Settings" in the circle in the picture on the "Card Life" interface, as shown in the picture below.

4. Then click "Value-added Services" indicated by the yellow arrow in the picture below on the "Card Settings" interface.

5. On the "Value-Added Services" interface, click "Free Bill SMS Reminder" as shown by the arrow in the picture below.

6. Click to receive the mobile phone verification code on the new interface, then enter the mobile phone verification code and "Read Terms and Conditions", and finally click "Customize" in the yellow box below, so that you can receive each I received a bill reminder text message from the bank every month.

Baidu Encyclopedia - Bank of Communications Credit Card