What's the matter with the mobile phone calling to show that it can't connect to the mobile network?

If you use a vivo phone and there is no data network during the call, you can refer to the following troubleshooting methods:

1. If there is no HD icon in the status bar, please contact the operator to start the VoLTE service or connect to the WiFi network;

How to turn on VoLTE:

At present, the system turns on the VoLTE HD calling function by default, and there is no setting option. Just contact the operator to start the VoLTE service and use it under the coverage of VoLTE network.

The telephone numbers of the four major domestic operators are: 10099 (China Radio and Television), 10086 (China Mobile),10 (China Unicom) and 1000 (China Telecom).

Funtouch OS 9 and above, enter Settings-Mobile Network/Dual Card and Mobile Network-Mobile/Unicom/Telecom-VoLTE HD Voice Call. If this option is not available, it will be turned on by default.

Funtouch OS 9 has the following system startup methods:

Path 1: Go to Settings-More Settings-About Mobile Phone Status-SIM Card, just open "VoLTE Call";

Path 2: Enter Settings-Telephone and turn on "VoLTE Call".

If the above path does not have this switch, you can enter this link page to consult online customer service for details.

2. When using the dual card, you can enter the settings-dual card and mobile network-and open the "Internet access during call/intelligent switching data card". After it is turned on, you can use the data network of the secondary card for a short time when talking;

3. If the location of the 4G/5G network is unstable, it is recommended to try again in another location;

4. When the 5G dual-pass model needs to realize sub-cartoon voice in a part of the 5G frequency band, use the traffic of the main card.

To realize the dual-card dual-pass function, the following conditions need to be met: the mobile phone supports dual-pass; Both mobile phone cards are registered to 5G? SA network; The call is made under VoNR; Two mobile phone cards are registered to any frequency band in n 1/n28/n4 1/n78 (some models, such as S 16Pro, only need to register card 1 to the corresponding frequency band of SA network and card 2 to the corresponding frequency band of 4GLTE network).

At present, the models supporting smart data card switching are: iQOO 1 1, iQoo1Pro, X90 series, X Fold+, iQOO 10, iQOO 10 Pro, X80 series, X80 series. X50 Pro。

If you have more questions, you can go to official website /vivo Mall APP-My-Online Customer Service-Sliding Bottom-Online Customer Service-Manual Customer Service for consultation.