The steps to change your circle of friends’ personalized signature on WeChat are as follows:

1. Open WeChat and click on the My option in the lower right corner to enter the personal information page.

2. On the personal information page, click on the WeChat ID or avatar at the top to enter detailed personal information settings.

3. On the detailed personal information page, click More Options.

4. In the pop-up menu, find and click the personalized signature option.

5. In the personalized signature edit box, delete the current personalized signature, and then enter the new signature content.

6. After completing editing, click the Save or Finish button to update your personalized signature.