It’s the third party wordpress plugin used to send SMS if you don’t want to use twilio. We try to provide flexibility to use SMS gateway according your requirement and country support.
So it should be in budget for the user. By WP SMS you can add the ability of SMS sending to your users. WP SMS tried to cover the best and the most well-known SMS gateways. It’s supporting more than 150 SMS gateways. If you enable WP SMS then above twilio account is not in used anymore.
If you configure WP SMS then it’ll automatically start working to send payment SMS to your customers. If you are facing any issue with WP SMS then you need to contact plugin support.
You can download plugin from here https://wordpress.org/plugins/wp-sms/