Mr DE Coster says a simple approach can pay dividends.

德科斯特表示，一个简单的方法会带来回报。

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These are often sold out quickly, but not necessarily to new customers, Coster says.

按Coster的说法，这款新手机总是很快就销售一空，不过购买这款手机的用户并不全是新购机用户。

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These are often sold out quickly, but not necessarily to new customers, Coster says.

按Coster的说法，这款新手机总是很快就销售一空，不过购买这款手机的用户并不全是新购机用户。

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