I am just wondering if anyone has the experience with a Marketo landing page, and a mobile device, with the profile turned on. Does it work on mobile? If so what conditions am I missing. what needs to happen to make sure that the form will auto fill automatically.
You must mean Pre-Fill and not (Progressive) Profil(ing).
Both work on mobile on Marketo LPs, in any case, but are quite different features.
You'll have to specify what you mean by "mobile" as in OS and browser and supply your URL.