You can now create a pop-up to have users enter their number and have it go directly to an opt-in or lead list using the HTML provided in this attachment.
Select the document with the desired short code. Open the HTML in any simple text editor and (Ctrl+F Windows, Command+F Mac) Search for "Keyword" and replace it with the keyword associated with your list. Keep all grouping symbols i.e. quotes and brackets, edit the TEXT ONLY.
Tip: When right-clicking on the mouse it will bring up a menu and by selecting View Page Source you will see the HTML code in full.
Below are different snapshots of the HTML code that demonstrate the wording you are able to edit if you would like.
Once you are ready to publish the Widget you will then Copy and Paste the code into the HTML Widget in any web builder. When the "Send to mobile" Link is clicked it will generate this popup or your very own customized version.