1. Step 1: Open the phone and find the WeChat icon on the desktop. After entering the homepage, click My Options in the lower right corner, and then click Settings Options under My Page.

2. Step 2: After entering the setup page, click the account and security options below.

3. Step 3: On the opened account and security page, you can see the current micro-signal and mobile phone number. Click the mobile phone number option below.

4. Step 4: After entering the mobile phone number binding page, click the change mobile phone number button below.

5. Step 5: Click to enter the replacement page. The region or country that needs to set the new mobile phone number defaults to Chinese mainland, then enter the new mobile phone number below and click the Next button in the upper right corner.

6. Step 6: Click the button in the confirmation prompt that pops up.

7. Step 7: After entering the page for filling in the verification code, enter the received verification code into the input box below and click the Submit button.