Adduplex Teasers: #Lumia 521 top phone in US. WP8 crosses 70%, app usage grows 2X since last September.

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Time for some Adduplex teasers!!

• Lumia 521 has become the top sold Windows Phone device in US. Last month it was at 2nd rank.
• WP8 has grown to cross 70% from 67% last month.
• Average Windows Phone app usage has grown 2x since September of 2012.
• AT&T has perhaps become top windows phone operator again in US.

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