How does the undertaking bank send a text message to inquire?

There is a problem with the network settings or SMS settings.

First check whether the number of the SMS service center is set correctly.

(usually in SMS options or settings)

The correct number of SMS service center should be++861380XXXXx500, where xxxx in the middle refers to your local telephone area code. If it is a 3-digit area code, add 0 to make up 4 digits. For example, the number in Beijing should be +86 138000 10500.