In the first 24 hours of pre-orders alone, Apple fans bought over four million handsets. For the sake of comparison, the iPhone 5 sold more like two-million units in its first 24 hours of pre-orders.
Of course it could be everyone bought one of each size and so there will be 50% returned. That’s unlikely though at that level.
Just reaffirms that people wanted a bigger iPhone.
Gavin's Gadgets & Photography 
So on that statistic we should expect over 10 million sales over 3 days?
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Well if that happens then hats off to Apple
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They sold 9 million last year
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