Why is the Unicom signal always poor recently?

If you use a vivo phone and the signal is not good, you can handle it in the following ways:

Case 1: Impact of port number transfer: At present, all operators have started port number transfer. If the port number is transferred to China Unicom, all new cards of China Unicom have closed GSM(2G network). If the supplementary card of vivo mobile phone used does not support Unicom 3G/4G, it will display no signal, so it is suggested to set this card as the main card.

Note: SIM cards supported by mobile phones and corresponding SIM signals are displayed. Please click this link to consult online customer service.

Case 2: Bad 5G signal: Many 5G base stations will not be open all day, and operators will optimize and adjust the 5G network during the opening period. It is recommended to consult the operator's customer service to find out whether it is in the adjustment and optimization period at present or in the near future, resulting in unstable 5G signals. If not, you can use the following methods to investigate:

1. Please check whether metal protective shell, magnetic protective shell, magnetic bracket and other accessories are used. Metal and magnetic materials can easily interfere with signal reception. It is recommended to remove the parts for inspection.

2. If you are in a closed indoor environment (such as basement, elevator, etc.). ), the cell phone signal may be blocked, resulting in poor signal, you can go to the outdoor environment to check. If you are in a remote area and the signal may be poor, you can use the cell phone signal of the same operator network around you to determine whether it is the cause of network coverage.

3. Observe whether there is dirt or oxidation on the metal surface of SIM card, and check it after cleaning. If you use a tailored SIM card, it is recommended to replace it with a standard SIM card. Install the SIM card to other devices, or install other SIM cards to your mobile phone for comparative test to determine whether the SIM card is faulty. If it is due to the SIM card, it is recommended to reissue the card in the operator's business hall.

4. If two telecom cards are used at the same time, the secondary card (non-data card) needs to contact the operator to open the VoLTE service before registering the network within the coverage of the VoLTE network.

5. Go to Settings-System Management-Backup and Reset-Reset Network Settings-Select the corresponding SIM card-Reset Settings, and then use it to view it.

Note: Resetting the network settings will delete and disconnect the connection and pairing records of WLAN, mobile data network, Bluetooth and other networks. Before operation, it is recommended to back up the data such as WiFi account number and password, and you can enter the cloud service-data synchronization-turn on WLAN and Bluetooth to synchronize the data to the cloud service; 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.

6. If there is no "Reset Network Settings" menu option on the mobile phone, you can enter Settings-System Management/More Settings-Backup and Reset/Restore Factory Settings-Restore All Settings-Restore.

Note: Restoring all settings will not delete any data or media files, but only restore all settings of the mobile phone, and some third-party application accounts need to log in again. Please make sure that it will not affect the use of the software before operation. For the safety of mobile phone data, it is recommended to back up mobile phone data in advance before operation. (You can go to Cloud Service-Device Cloud Backup-Backup Data Type-System Data-Back-Back up some backup system settings and desktop layout immediately; Cloud service-data synchronization-enable WLAN, Bluetooth, etc. Synchronize data to cloud services)

7. If the above methods can't be solved, please back up the information in advance and take your mobile phone and purchase certificate to the vivo customer service center for testing.

Tips: It is suggested to call the staff of the service center in advance when going to ensure that the staff will go again during normal working hours, avoid running empty and pay attention to safety on the way back and forth.