How to modify the YY password of mobile phone is more detailed, and where to send text messages! ! Can a mobile phone that can send text messages be bound to YY?

I just changed it. I exchanged it with a secret mobile phone. Secret mobile phones can be exchanged. First click on your YY avatar, and your personal information will come out. There is a password to be changed next to your account. Enter your account and use your secret phone to retrieve your password. Then you send a message to YY customer service and give you a verification code. You fill in and enter what you want to change it with now. Good luck.