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Why did I receive missed call reminder text messages from Guangdong Call Manager many times?

When using the Guangdong Call Manager service, the reasons for receiving multiple missed call reminder text messages may be:

1. Multiple calls to the user’s mobile phone from the same number will be redirected to the Call Manager system. , and sends multiple missed call text messages to the called user, but the missed call time prompts are different;

2. If you are in an abnormal state (power off, no signal, etc.), the SMS center The text message will be resent multiple times within 48 hours until you receive the missed call text message, so you may receive missed call text messages with the same content repeatedly after turning on the phone or having a signal.