You can find here an example of how your file format should be:
SMSArena is a fully featured bulk SMS platform that enables businesses to send SMS to their customers with the lowest cost. We offer high-quality SMS routes for all Spanish operators, great flexibility in SMS packages and a “best price” guarantee in order to make you feel 100% safe about your choice.
Powered by M-STAT
Awarded Top 5 A2P
Email: email@example.com Phone: +34 910032951