I propose we pause on this and spend some time exploring Collect: send submissions by SMS and Internet simultaneously. I think it'll solve the fundamental problem more elegantly without adding more to the current UI. Also, we have a user to ground those changes, so that's a huge bonus.
I'm arguing for this approach because SMS submissions are a very small percentage of current submissions. These proposed changes will make SMS submissions slightly more convenient, but will potentially make the UI more complicated for HTTP submissions.
Does this seem reasonable?