Did the landlord reserve a mailbox at home? If not, you must register an email address first. The specific method is "Login to Online Banking-Credit Card-Credit Card Management-Modify Personal Data-Modify Address Information-Enter Email Address" to complete the registration.

If the mailbox registered by the landlord is online banking, you can change the bill sending method at the same time. The steps are: online banking-credit card-credit card management-bill sending method-check email-enter SMS dynamic verification code, which can be modified.

If the landlord has registered an email address.

Then you can edit the short message "card number CCHD﹟-last four digits -024" with the mobile phone number reserved in his home system and send it to 95533 to change the bill sending method. After sending, the default is to open the electronic bill and cancel the MMS bill.

In addition to the above two ways, the most traditional way is to change the phone, but since there is a self-help channel, I am too lazy to call the service hotline.