Video
Steps
1. Login to the Yahoo Web Hosting Control Panel.

2. Click on Domain Control Panel

3. Click on Manage Advanced DNS settings (NOT Manage Subdomains).

4. Under A and CNAME records click the "Add Record" button.

5. Enter the following information in the corresponding boxes
Source: m
Destination: mobile.dudasite.com

6. Click Submit and then submit again the next page. It's as simple as that!