SP(Service Provider)是指移动互联网服务内容应用服务的直接提供者，负责根据用户的要求开发和提供适合手机用户使用的服务。SP通过运营商提供的增值接口为用户提供服务，然后由运营商在用户的手机费和宽带费中扣除相关服务费，最后运营商和SP再按照比例分成。 手机终端上的 SP 服务包括纯文本短信（ SMS ）它是最简单的 SP 业务。还包括用户可以获得各种个性化多媒体内容的彩信。除此以处游戏、彩铃、交友社区、广告等等都是增值业务。
查看通信百科中关于“SP”的定义
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