One thing you could do is use the Tapatalk App. The forum website isn't that far on the "Mobile-optimization" spectrum.
I suspect the issue you're having is that when you go to your profile summary, and click on "Modify Profile", nothing happens, or the menu flashes and goes away before you can do much of anything. Whereas on a computer with a regular mouse, you hover and then select on the options. You can't really "hover" on a touch-screen, so the browsers interperet things to make a best guess, because so many CSS menus rely on that hover event to work.
If any admins see this, in my experience, using href="#", rather than href="" that is currently on the "Modify Profile" button should clear this, if this is in fact what is happening.