A: Use a long-distance VIVA is the cost of 0.2 yuan / minute, as a form of call-back call, so mobile users must answer for free business, or charge a person called mobile costs.

• 答：使用一个长途非凡，是0.；2元的成本/分钟，由于电话的形式回电话，让手机用户必须回答的免费业务，或负责人所谓的移动费用。