"extensive" - something that covers a wide area "logistics infrastructure" - the handling of operations, like how boxes will be shipped from one place to another, who will receive them, how services will be given, etc. "retail unsubsidized" - The "retail" here refers to how much an item will sell for, and the "unsubsidized" means that the company, in this case Vodafone, will not contribute money to lower the cost of the phone. Many companies will "subsidize" a phone to bring the price down.
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