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Mobile Knight cards used for express delivery are often blocked

Mobile Knight cards used for express delivery are often blocked because the call time is too short. According to the query of relevant public information:

1. When the phone card is locked, it is usually caused by not answering the phone for a long time. When making a call in the high-frequency domain, the call time is about 30 seconds to 3 minutes, so that the system will identify it. It's a sales pitch, and a scam. 90% will be blocked.

2. If you have not used calls for a long time, only use high-frequency text messages. The system will identify it as SMS promotion and fraud, and it will also be blocked, 80% of which will be blocked.