@hpctech the answer is simple: In your case the ACF is empty, because there is no place so far where you are filling the information that this field should be displaying. The ACF is a “container”, but from where is this container grabbing the information that should be displayed?
Let’s say you use a post to do this. If I am not wrong in your current settings, if you go to Posts > Add new, you will see the new sms2 field you created (below the content editor). Fill that text area with something, a number, whatever, and save it, then in the page where you are using the shortcode write
[acf field="sms2"] or
[acf field="sms2" post_id="524"] and replace 524 for the post-ID from where you want to grab this info.
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