A button can be inserted in a XHTML page on a 3650 using <input type="button">.
But what do I have to do to associate an action to the button ?
Is there a way, for example, to submit a form using a button (and not with a submit input) or buttons are definitively unuseful on 3650 ?
Actually, the <input> element in XHTML Mobile Profile specifications omits support for type="button" (and type="image" as well). So the use of that is not recommended although it might render on some devices.