Phone optimization doesn't start after approving desktop designs. It's important to think "mobile first" for two reasons. First, your designer's layout will flow better if starting small and expanding to a larger screen (it will scale up well). Secondly, mobile first will give your users a cleaner, snappier experience. Ultimately you need a responsive design that expands and contracts to any screen size. There are a ton of mobile and tablet devices out there today,

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