Until recently, wireless carriers have often called the shots on what consumers see on cellphones, taking a cut of revenues from providers of add-on services and software.

直到不久前，手机用户能享受哪些无线增值服务还是手机运营商说了算，手机增值服务和附加软件提供商不得不与运营商分享收入。

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The World Bank will add to the Gallup World Poll a broad set of questions on the use of savings, credit, insurance and payment services, targeting the poor.

世界银行将给盖洛普世界民意调查加入一系列有关储蓄、信贷、保险和支付服务的使用的问题，目标集中在贫困人口身上。

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The ability to purchase add-on feature packs which can be used to provide a varying array of extended services.

购买增件特性包的能力，这些包可用于提供许多扩展服务。

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In 2009 Xerox acquired Affiliated Computer Services, which tilted the business model away from printing and more toward add-on services.

FORBES: Xerox Works To Duplicate Copier Glory In Digital Services Model

But some people say the new devices create confusion because add-on services make their wireless phone bills bigger and more complex.

FORBES: Verizon Sends Subscribers Fact Sheets To Educate About Data Charges

Those incorrectly charged for the add-on services between December 2007 and August 2011 are to be repaid for at least 90 days worth of fees.

BBC: Discover to refund $200m to customers