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                        Tooltips on icon component doesn't display on mobile
Tooltips do not display on mobile when using material-icon.
Tapping the icon does nothing, as opposed it does with other tooltips types.
Are you talking about the material-icon-toolip component? I find that the tool-tip does appear when you touch it on iOS.
If you are referring to using the materialTooltip directive with a material-icon, then I'm not sure the desired default behavior on a mobile device is to show the tool-tip when you touch the icon. Icons are commonly used as buttons and links so we wouldn't want lose functionality in those use cases.