1. To view the existing SMS gateway, go to SMS>Gateway.
2. The next screen displays the list of all the existing SMS gateways.
3. To add an SMS gateway, go to SMS>Gateway. Click on 'Add' button.
4. Fill up the desired fields, and click on 'Save' button to save the changes.
5. Fill up the further details on the next screen and click on ‘Save’ button.