We recommend that people don't use a mega menu on the phone, as the number of links would be overwhelming, and from a technical point of view, it is difficult to make a mega menu that smoothly adapts to the smaller screen.
Instead, we recommend that you use a combination of the mega menu on desktop and one of our modal menus (or the standard mobile menu) for smaller devices.
We made a blog post that will guide you on how to combine them (Video at the bottom of the post).
For example:
You can use mega-menu-1 for desktop and basic-modal-menu-4 for smaller devices.