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Is it illegal to send SMS advertisements?

"Sending spam messages is a typical violation of consumers' rights and interests." Qiu, legal adviser of China Consumers Association and lawyer of Beijing Law Firm, said that spam messages first violated consumers' right to peace. At present, mobile companies have a special service port for reporting spam messages, 10086999. At present, mobile companies prohibit customers from sending spam messages and advertising messages, and there is a daily limit on the number of messages that can be used frequently.