Make sure you have registered to SwiftText. If so, SwiftText will send you a message code. You can use that message code to opt-in customers.
Ask your customers to SMS 636-206-3242 and use your message code to opt-in. Display 636-206-3242 and your message code in your site, office, work place, or social media.
Example: If you message code s 3598, display:
Use https://aasoftech.com/swifttext-send-opt-in-message/ to send message to your customers.
Use https://aasoftech.com/swifttext-sendmessage-with_attachments/ link and attach the list of mobile numbers saved in notepad to the form.
Use https://aasoftech.com/swifttext-sendmessage-with_dynamic_mobiles/ link and add the list of mobile numbers in the form and send SMS.