How does steam bind the mobile phone number?

Take WIN 10 operating system as an example, and the binding method is as follows:

First, click "Steam" on the computer desktop.

Second, after entering, click the option in the red box in the upper left corner of the page below.

Third, find the "Settings" item and click Enter.

4. After entering the settings, select the option of "View account details".

5. Then find the item "Add mobile phone number" and click enter.

6. Enter the mobile phone number to bind after entering.

7. Then get the verification code and enter it.

Eight, after verification, the binding is successful.