However, it still remains to be seen how much of the Lumia mix was driven by Windows Phone 8 volume, and if the shipment volume was propped up by some of the older Lumias that were deeply discounted.

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East Coast and Gulf inbound shipments alone account for nearly half of all inbound shipment volume.

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Lumia shipment volume was 4.4 million units, more than 4 times the same in the fourth quarter of 2011.

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