The payment methods can be classified into three categories according to different types of short message services: the called party paying, the SP paying and the third party paying.
根据短消息服务类型的不同，可以将付费方式分成三类：被叫方付费、SP付费和第三方付费。
The payment methods can be classified into three categories according to different types of short message services: the called party paying, the SP paying and the third party paying.
根据短消息服务类型的不同，可以将付费方式分成三类：被叫方付费、SP付费和第三方付费。
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