Apple will announce MOnday they have sold the most iphones in a weekend in the history of the company. Imagine the logistics nightmare to sell that many phones. The truth is demand is increasing and every year before launch weekend apple is increasing the time interval between production initiation and launch in order to increase inventory. The negative impact is increasing leaks etc. Now look at Samsung. it took them 100 days to sell 20 million of their s4 flagship phone. In the same time period apple sold 27million of its "outdated phones". Not to mention there has been a cliff dive in sales of the s4 just google it. Now lets see how long it takes Apple to sell 20 million iPhones
I am guessing two weeks at the most.
So although the simple and obvious analysis will come to the conclusion Apple is limiting supply for the marketing, a deeper analysis and actually looking at the facts of how many actual phones are produced and sold and consider limits in the supply chain and manufacturing the more logical conclusion is demand is outstripping production capabilities. (hows that for a run on sentence)
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Most people here seem to ignore all these.