Hello hardsofft,
SMS support is very limited. One can generate a SMS message via onclick events in the properties menu of the editor. But there is no ability to include any text in the body. Alternatively, the same buttonclick event can be triggered in JS code.
Both of these only bring up the SMS app in the phone and have the phone # entered. User still has to compose the body text and then hit send.
I have been looking for a solution to sending SMS messages, but did not have much luck. Many of the free sms sites lock you in to the site interface. And most of them are geared to sending out the sms from their web site.
There might be a bit better news on the Android front re this capability, based on some articles I read. But I did not have the time to test it yet.
TG