以下哪一个第三代移动通信(3g)的主要标志性技术之一?( )

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短信服务

短信服务为用户提供一种通信服务能力，支持快速发送短信验证码、短信通知等，服务范围覆盖全球。完美支撑双11期间2亿用户，发送6亿短信。三网合一专属通道，与工信部携号转网平台实时互联。

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以下哪一个第三代移动通信(3g)的主要标志性技术之一?( )

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