1. Sign into your work or school account and then go to your My Account portal. (https://myaccount.microsoft.com/)
2. Select Security info in the left menu. Then, select Add sign-in method in the Security info pane.
Select Phone from the list, and then select Add.
3. Select your country code and input mobile phone number, select Receive a code and click Next, you may receive the SMS shortly.
4. Fill in the figures from SMS and click Next.
5. Your Phone is successful verification.
Usage example：
When accessing CEIBS ChatGPT (https://ceibs-chatgpt-playground.azurewebsites.net/), after verifying the work or school account and password, you need to enter the code from SMS. The process is as follows:
Select Text for SMS verification and input code and click Verify.
CEIBS ChatGPT Page displayed as below.
