What is Samsung Hub in Samsung Galaxy S4(GT-I9500)?
Samsung Hub is an exclusive app for you to purchase and download multimedia content. You can also manage the content on the device. So, it is essentially an integrated store to shop, and manage your videos, games, books music and learning. Currently, Samsung have some many Hubs: Music Hub, Game Hub, Readers Hub, Media Hub and Learning Hub.
( Samsung Hub in Galaxy S4 )
Samsung Hub works with your Samsung account, so all purchases of content are linked to the Samsung account you signed in to on your device. You may also be able to access some content on other Samsung devices that support Samsung Hub.
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