The postal savings bank card changed its mobile phone number at the counter. I didn't receive the SMS notification when I saved money. Why?

That's because the SMS reminder has expired and needs to be reopened.

Open the bank card SMS reminder method:

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2. Log in to our personal online banking, enter online service → messenger service agreement → use agreement → open service agreement → open/modify/cancel → select "open" to customize messenger service → confirm the success of opening.

Method 3: Go through the self-service terminal of the bank outlet, insert the card and enter the password to verify the ID card, and then select SMS → Select Open (view the usage agreement) → Enter the bound mobile phone number → Confirm with the verification code → Open successfully.