First, you need to open your phone, find the WeChat icon, and then click Open.

Then, you will enter the WeChat interface and find "I" in the upper left corner. On this page, click the option named Personal Information. Then, click the More Information option.

Next, click the "Personalized Signature" option to enter the text modification page.

On this page, you will find a small blank box waiting for you to fill in your new personality signature. You just need to enter what you want to say in the box, and then click the "Save" button on the screen.

In this way, your personalized signature is completed!