To turn the mobile data for your Samsung Galaxy S 4 mini on or off, follow these steps.
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From a Home screen, tap Apps (located in the lower right).
These instructions apply to Standard mode only.
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From the Apps tab, tap Settings.
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From the Wireless and networks section, tap on Data usage.
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Tap Mobile Data to enable or disable.
Enabled when a check mark is present.
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If presented, tap OK.
Related Topic: Manage Data Usage