Submit button not visible on android smartphone

I have just made a form for a client using jotform -  looks just great except I noticed that on my Samsung android smartphone, the submit button is not visible and how do I make the header mobile responsive?

Many thanks for your help

At the start of your iFrame code, it looks like there are two height attributes added:

<iframe id="JotFormIFrame-70533414295959" style="width: 100%; height: 3125px; border: none;" src="https://form.jotform.com/70533414295959" width="300" height="150" frameborder="0" scrolling="no"> </iframe>

Try removing the second set of width/height attributes to see if that helps.  If that full form is still not showing on mobile, try the iFrame embed code without the javascript portion, only the following:

<iframe id="JotFormIFrame-70533414295959" style="width: 100%; height: 3125px; border: none;" src="https://form.jotform.com/70533414295959" frameborder="0" scrolling="no"> </iframe>

Increase the height as needed.

Great advice - many thanks - all sorted now:)