However, you can only send unrestricted text messages to your own verified numbers. For other numbers, due to fraudulent use of the free message credit in the past and to protect text receivers from spam/phishing attempts, you can now only test our service by sending the standard sample message that Sinch have created. You will be able to send this pre-programmed message to multiple numbers to evaluate the service and to see how it works.
Once you add credit to your account you are free to personalize messages as you require. Click here to learn how you can easily upgrade your account.