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You may check the Galaxy S4 online manual page, Galaxy S4 features explained page, or the Galaxy S4 User Guide (PDF format, more than 20 different languages) page to find more info on Galaxy S4.
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My S4 turns on but then freezes on the Metro PCS (Wireless for All) screen. What can I do to correct this?
Your can try to clear cache partition by following this guide http://gadgetguideonline.com/s7/sasmung-galaxy-s7-how-to-guides/how-to-clear-cache-partition-on-galaxy-s7-and-galaxy-s7-edge/
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