The Unicom card bought on Taobao has no voice and SMS functions, and it is a pure network card. How to modify the password?

If you haven't set the service password of Unicom's wireless network card before, you can log in to the online business hall/homepage, and click Deal with Business > Service Password Management > Service Password Reset, or click Forgot Password on the online business hall homepage and follow the prompts. Or you can go to the local business hall.