How to modify the service password of Unicom mobile phone card through SMS?

1. You can send a short message "40 1" or "XMM # old password # new password #" to 100 10 to modify the secret service password for free. 2. Send the free SMS instruction "MMCZ#6 new password" to 100 10. Users in some areas can edit the short message "MMCZ# 6 new password # 6 digits after ID number" and send it to 100 10 to apply for resetting the service password. Tips: Commercial policies in different cities are different, and the specific situation is subject to local policies.