www.kjlk.net > GSM中怎样区分PHAESE1和PHASE2手机?

GSM中怎样区分PHAESE1和PHASE2手机?

advice of charge话费通知,calling line identification来电显示, call waiting呼叫等待,call hold呼叫保持,conference calling电话会议,closed user groups集群网Phase1,Phase2,Phase2+ 是按功能划分的三代手机,现在GSM的是phase2

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