The specific steps of setting personalized signature are as follows:

1: Log in to QQ with your mobile phone.

2. In the QQ interface, slide your finger out of the menu, and then click your QQ avatar in the menu.

3: On the profile page, click "Edit Profile" in the lower left corner.

4. On the "Edit Data" page, click "Personalized Signature" to enter the editing interface.

5. In the editing interface, you can enter text or modify your signature. After editing, click "Publish" in the upper right corner.

6: Return to the profile page after completion, and you can see the modified personalized signature.