Send an SMS via the web! If you want to use the app, please get in touch so that I can assign to you a temporary password. That way, you can SMS the person of your choice and try the app. If you already have your credentials, you can run it from here or click on the image below.
To add to the complexity, there is no absolute formatting for a world phone number, nor can it be fully grasped by any regular expression. At some point we have to try the user’s input.