What is the situation that the mobile phone has no traffic?

If you use a vivo phone, you can view it as follows:

1, check the cell phone signal

If your mobile phone uses a metal or magnetic protective case or bracket, I suggest you 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. I suggest you go to an open place, such as an outdoor open environment for 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 your calling card restricts outgoing calls, 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.

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 2/3G calling network environment in your location is not good, it is recommended that you contact the operator to open the VoLTE HD calling service and try again. When the VoLTE function is turned on, the HD icon will be displayed in the signal bar.

6. Comparative test

I suggest you compare the phones with the same carrier card around you. If there is this phenomenon, it may be caused by the poor network quality in your location. You can move to another place 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, I suggest you go to Settings-System Management-Backup and Reset-Reset Network Settings-Select the corresponding SIM card-Reset Settings, and then use it to check.

* Note: Resetting the network settings will reset the WLAN, mobile data network and Bluetooth connection records.

8, service center testing

If the above methods fail to solve your problem, please back up your mobile phone data in advance, and take your mobile phone and purchase certificate to vivo customer service center for testing.