That, clearly, means that the airtimeprovider must subsidise that initial purchase and then recover its subsidy over the life of the contract.
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2.
And there are times and places when it depends upon the airtimeprovider not the handset manufacturer (indeed, times when you need both, not just one or the other).
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3.
The problem for the network operator (or airtimeprovider, whichever you prefer) is that they have to provide a subsidy to the consumer in order to get them using an iPhone.