Snapchat has become synonymous with smartphone selfie filters and lenses, despite some privacy missteps, and there are a whole lot (both official and user-created) to choose from. Butterfly lenses are particularly popular, but you won’t be able to use them right out of the gate. If you’re new to Snapchat or simply haven’t added one of these lenses to your repertoire, you’ll have to add them manually because they aren’t part of the default assortment. Which butterflies lens to
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