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What does the value-added information fee of China Unicom mean?

The cost of value-added services mainly includes the cost of value-added services you use, such as SMS/MMS, Unicom letters, ringing, super ringing, voice mail, handheld stock market, mobile Internet access, mobile TV, mobile newspaper, mobile music, mobile email, mobile search, instant messaging, Unicom Li Yin, Unicom secretary, telephone navigation, video conference and teleconference.