After logging in the account from the left side menu bar, below the heading of SMS Gateway >SMS on my site. On clicking this tab the page to SMS on my site will appear.
Please select your country from dropdown to register mobile number on your website.
Add mobile number in mobile number field.
If you want to make this mobile number Active. Then check the box before Status and click on Save button.
After clicking the save button a pop up window will open that will display the Code to pase in your website to use this service.
After saving, the mobile number will be shown in the list below.