WP SMS plugin is integrated with Mitto Gateway, and by using them, you can send SMS to anyone in the world.
For more information, check out this page.
After that, go to the gateway field on WP SMS Settings to check out WP SMS Panel and gateway configuration options.
You need API Key and Sender Number to configure the gateway.
Follow the below steps and fill out the fields:
- Go to WP SMS Plugin » Settings » Gateway
- Fill out X-Mitto-API-Key and Sender Number
- Then, Save Changes to see Gateway Status is activated!