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Nokia Lumia 520 review - All About Windows Phone
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Nokia Lumia 520 review: does Nokia need another budget Windows Phone? | Engadget
Nokia Lumia 520 specs - PhoneArena
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Nokia Lumia 520 Battery Replacement - iFixit Repair Guide
Nokia Lumia 520 review: Best buys: Phonebook, telephony, messaging
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Nokia Lumia 520 Teardown - iFixit
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