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What is Unicom in the letter? Can I cancel it?

"China Unicom" is an information subscription and on-demand service based on SMS platform, which can be used by Unicom mobile phone users. "Unicom in the letter" allows Unicom mobile phone users to enjoy life, information, business, entertainment and other information anytime and anywhere through SMS.

Due to the different policies of different cities, there are different ways to block, cancel or inquire about Unicom's telephone charges. For details, please contact local customer service.