The mobile phone number is no longer used, how to log in to qq?

I didn't use my mobile phone number before. The method of logging into qq is as follows:

Mobile phone: iPhone 13

System: iOS 13

Software: Qv8.95

1. Open mobile qq, enter qq number and password, click "arrow" and click "Other authentication methods".

2. Click "Data Assistant Verification".

3. Fill in the secret mobile phone and click "Next".

4. Check the group you join according to the actual situation. If not, please check "None of the above" and click "Next".

5. Check your used avatar or "None of the above" according to the situation and go to "Next".

6. Prompt that the login verification is successful, and return to the login page to log in to qq.