21. Just how well prepared are the nation’s service providers when it comes to managing the
emergence of smart phone devices?
(A) It’s an important question because smart phones are growing more innovative by the day.
(B) Fancy technologies offer the operating system of a PDA connected to the data access capabilities
of the modern 3G network.
(C) That’s good news for service providers desperately seeking to boost profit margins.
(D) Using a weighted cost of $2 per minute, each smart phone costs $100 per year.
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VIP與詳解卡管理
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