RemixIconEx.Device.cellphone

You're seeing just the function cellphone, go back to RemixIconEx.Device module for more information.
Link to this function

cellphone(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Device.cellphone()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M7 2h11a1 1 0 0 1 1 1v18a1 1 0 0 1-1 1H6a1 1 0 0 1-1-1V0h2v2zm0 7h10V4H7v5zm0 2v9h10v-9H7z" />
</svg>

example usage

svg.icon {
  width: 96;
  height: 96;
}