Text button only for iPad?

I’m enjoying the plugin – works great for my mobile visitors. I’d love to be able to add a text button for iPad users. We’re using the Vantage Premium theme and I can’t seem to figure out how to get the mobile version to render on iPads, rather than the desktop version. But I’m not sure I want iPad users to get the mobile site, as they may try to “call” our two stores using FaceTime audio.

Is there any way to have that text button appear for iPad users? We’re using iMessage, so any connected iPad user could message us, if we served up the button. Thanks.

The page I need help with: [log in to see the link]