Integrate Magento 2 with ClickSend SMS to send SMS notifications to admin and customers. Here's how to install:

• https://help.clicksend.com/article/lleipcpx69-install-click-send-sms-plugin-to-magento-to-send-sms-notifications
• https://help.clicksend.com/article/397oj0rb1y-click-send-sms-in-magento-how-to-trigger-sms-notifications

Or integrate through Zapier: https://help.clicksend.com/article/dbi84r6l6w-magento

With Zapier, automate.io and integromat integrations you can:

• Send SMS
• Receive SMS
• Send MMS
• Send text-to-speech voice calls
• Send letters
• Send custom postcards
• Send fax
• Create contact and list
• Delete contact and list
• Search lists and contact by phone and email address

This integration is free. You only pay for the messages sent.