Feb. 7, 2020, 11:25 a.m.
demoiss on March 18, 2019, 10:34 a.m.
Download the source files of this form
Note that for each case, you can select either the simplest form of the URL (containing only your username) or the one including the id_string of the form.
The latter works without specifyin the SMS Keyword in front of every message.
You would use it when your SMS Setup/Provider is used for only one form.