Sinch provides SMS functionality via SMS channels on Conversation API apps. Conversation API calls (that make use of an SMS channel) often require the corresponding SMS channel's Service plan ID.
To locate your SMS channel's Service plan ID:
You will be able to view and copy the SMS channel's Service plan ID under the Service Plan ID column.
Learn how to get started with SMS by watching this step-by-step tutorial. The video explains the basics of SMS and shows you how easy it is to send your first message with Sinch:
Sign up to the Sinch Build Dashboard and get started today or take a look at the Sinch SMS Product page to learn more about our SMS products.