Default Enabling disabled apps.

I disabled Voicemail after it kept hounding us to setup visual voice mail after the 4.4 update. It stopped hounding us but now we can't enable it again. It doesn't give the option to Turn On. Anybody know a way to manually turn an app back on? Stock VZW KK

UPDATE
I figured it out. I had remembered a thread about resetting all apps back to default. Settings/Application Manager then tap the Menu and select Reset App Preferences
That reset all apps to their defaults. Enabling everything. But at least it turned my app back on.

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