I've already bought Freichat Corporate. I have installed it on Joomla 3. How can I set the freichat only for using on mobile? By the way can they speak while they chat on mobile.

Thanks,

Irik

You don't have to set anything. FreiChat will automatically detect mobile and show the correct interface.

By the way can they speak while they chat on mobile.

What do you mean by this ?
FreiChat does not include voice chat.