You can't answer the phone in a certain scene.
If you don't receive the cornet, it means there is no number:
It may be that the cornet exceeds the specified area when it is used. If it exceeds the specified area, the cornet cannot be used. It is suggested that the other party dial the ordinary 1 1 digit telephone number.
Unable to receive the fixed number, indicating that the user is busy.
Maybe I blacklisted the number. It is suggested to contact the other party by other means, and you can dial normally after removing the blacklist.
During the call, the called mobile phone card cannot call the third party.
Please contact the operator to open the "call waiting/call waiting/call holding" service, and there will be an incoming call prompt during the call. During the call, another mobile phone card that has not been called cannot call a third party.
The mobile phone adopts the design of "dual card, dual standby and single call", that is, two card numbers inserted into the mobile phone at the same time cannot use voice service or data internet service at the same time. When one card number is on a voice call, another card number cannot answer the call. If there is an incoming call with the other party's card number at this time, you may hear messages such as "The dialed number is not in service area" and "The dialed user is temporarily unable to connect, please redial later".
When one card number is in data connection state, another card number cannot use data Internet service. The above situation is caused by the "dual card dual standby single call" design of this mobile phone, which has nothing to do with the operator's network conditions. One-way communication is because the mobile phone is designed as a single chip, which can greatly improve the standby time and reduce power consumption.
It is suggested to consult local operators and offer services such as "missed call reminder", "incoming call reminder" and "secretarial service" to avoid the problem of missed call without reminder in the above scenario.
You can't answer the phone in non-specific scenarios.
1, check the cell phone signal
If the mobile phone uses a metal or magnetic protective case or bracket, such a protective case and bracket will affect the signal of the mobile phone. It is recommended to take it off and try it. If you are in underground parking lots, elevators and other environments, the coverage of mobile phone signals is easily affected by these environments, the signal will be weak, and the data network will also be affected. It is recommended to go to an open place, such as outdoor open environment testing.
2. Switch flight modes
You can try to switch flight modes, re-register the network and try again.
3. Confirm whether the mobile phone card has call barring service.
Some operators' calling cards have call barring service. If the supplementary card of the mobile phone card enables the call restriction service, some or all calls will be restricted. Please consult the operator's customer service for details.
Note: Go to Settings-Applications and Permissions-System Application Settings-Telephone-call barring to see if call barring is turned on;
Enter Settings-Applications and Permissions-System Application Settings-Telephone-Operator-Related Call Settings-(Mobile/China Unicom/Telecom/Radio and Television)-Call Restriction Check whether call restriction is turned on.
4. Confirm the status of the mobile phone card
Ensure that the phone bill balance of the mobile phone card is sufficient. If the phone bill expires, please restart the phone after the recharge is successful.
5. It is recommended to open VoLTE HD calling service (contact the operator to open it).
If the local 2/3G call network environment is not good, it is recommended to contact the operator to open VoLTE HD call service and try again. When the VoLTE function is turned on, the HD icon will be displayed in the signal bar.
6. Comparative test
It is recommended to compare the mobile phones that use the same carrier card around. If this happens, it may be caused by the poor quality of the local network, so you can move to other places and try again.
7. Upgrade the system or reset the network settings.
Please upgrade your mobile phone to the latest version. If the mobile phone is the latest version, it is recommended to go to Settings-System Management-Backup and Reset-Reset Network Settings-Reset Settings, and then use it again.
Note: Resetting the network settings will clear the connection records such as WLAN, mobile data network and Bluetooth; Dual cards need to select the corresponding SIM card.
Backup: Go to Cloud Service-Device Cloud Backup-Backup Data Type-Open System Data-Return to the previous page-Back up immediately and back up some system setting data.
8, service center testing
If the above methods fail to help the recovery, it needs to be detected and handled by the customer service center (customer service center address: go to vivo official website /vivo Mall APP-My service outlets/after-sales outlets-select provinces and cities to check the customer service center address). It is suggested to call the customer service center in advance to confirm the relevant matters and know that the working time is coming, so as not to delay precious time.
If you still have more doubts, you can enter vivo official website-My-Online Customer Service-Enter labor and consult online customer service feedback.