How to unsubscribe from harassing messages of China Unicom?

1. Dial the number 1000 1, select "Complain" in the voice menu, then select "Complain about sending spam messages" or "Complain about spam fraud messages", and follow the voice prompts to unsubscribe from Unicom harassing messages for free;

2. Send "QXTZ" to 1000 1 by SMS function, and unsubscribe from Unicom harassing short messages for free;

3. Dial the number 1000 1, select "Business Handling" in the voice menu, and then select "Reject Harassment Information" to unsubscribe from Unicom harassing SMS according to the voice prompts.