The SMS section of the Sinch Developer Portal contains detailed documentation about how to use the Sinch SMS API, API References, available endpoints, request and response formats, error codes, and more.
If you still have questions or need support please contact Sinch.
Watch this step-by-step tutorial to familiarize yourself with the basics of SMS and to learn how easy it is to send your first message with Sinch.
Sign up to the Sinch Dashboard and get started today or take a look at the Sinch SMS Product page to learn more about our SMS products.