Unicom card cannot send messages. How to change the service password?

The current mode modification failed, and it can be modified again in other ways: 1. Log in to the homepage of online business hall /02oec, click Business Processing > Other Services > Service Password Settings > Password Modification, and click "Do it now" to enter the original password and new password to complete password modification; 2. After logging in to the mobile phone business hall client, click Service > Handling > Business Handling > Service Password Modification, and enter the original service password and the new service password to modify the password; 3. Log in to the touch-screen version of the mobile phone business hall, and click Handling > Business Handling > Service Password Modification; 4. Send the message "40 1" or "MMXG# old password # new password # new password" to 100 10 for free to change the secret service password. In addition to the above methods, you can also dial the local telephone number 100 10 or go to the local business hall to modify the service password.