The subscriber you dialed is temporarily unavailable, and has been transferred to Hunan Mobile to remind you.

When making a call, there is often a language prompt: "The subscriber you dialed cannot be connected for the time being, and has been transferred to Hunan Mobile to remind you."

When this system prompt tone appears, it means that the called mobile phone is in the signal blind area (or signal shielding area). The system has automatically transferred the incoming call number to the incoming call reminder function of the receiver. Once the receiver resumes normal reception, it will be displayed as a missed call.

(When dialing the landline, this kind of similar system prompt tone will also appear, mostly because the line is faulty or the landline is not plugged in properly).