Send an SMS without user interaction.
Multiple numbers can be specified by comma-separating them.
Email addresses are not supported.
Store in Messaging App: whether a record will be kept of the sent SMS in the standard messaging app (only available prior to Android 4.4).
Success or failure can be caught by creating an Event context SMS Success/Failure.
Maximum length of an SMS is 140 characters. In some character encodings that translates to 140 characters, in others to only 70 characters.