Contact Form 7

See how to integrate WP SMS with Contact form 7 Plugin – The WordPress contact form 7 sms notification will allow you to receive SMS on your own phone number when someone fills the contact form and hits Send. The plugin integrates the SMS service from Twilio, which is reasonably priced with an excellent API, via our WP Twilio Core plugin on the WordPress.org repository.

After activating the plugin, all you have to do is select the registration question for mobile number to send SMS to your customers when they apply any action on the store.