Why does it take a long time to receive SMS reminders every time there is a balance change after the postal savings bank card is activated?

Some banks have too many short messages and send them at different levels. It is generally faster to deduct money, and slower to save money for salary.

There are still some problems with the mobile phone. It has been compared that the whole department uses a bank card, and its own mobile phone is fast, while colleagues' Unicom and telecommunications are slow.