Why is there no SMS notification when the bank card is less than 100 yuan?

Too little money, user arrears, registration error, signal failure.

1. The amount is too small: the transaction amount of the user is lower than the initial amount set by the bank outlet or the user to send SMS reminders.

2. The user owes money: the user owes money for the SMS notification service, and the communication company needs to pay back the arrears when suspending the SMS service.

3. Registration error: When the user opens the bank short message service reminder or changes the mobile phone number during the use time, the mobile phone number is registered incorrectly.

4. Signal failure: user operator network failure, mobile phone number information shielding, being out of service area at that time, etc.