Why didn't the Postal Savings Bank inform you when SMS was opened?

Go to the bank counter to check whether the mobile phone number and status notified by your SMS are normal. If everything is all right, then check whether your mobile phone has a program such as "harassment interception" and intercept your SMS notification as harassment SMS. If not, you can basically judge that you are not using a telecom mobile phone. The telecom used by the postal SMS platform is likely to be blocked by your operator. The customer service who called you complained bitterly and received it immediately after helping you handle it.