My Huawei mobile phone has no signal. What happened?

The signal display of mobile phone card has a strong correlation with the network environment. If the status bar of your mobile phone shows no service, we suggest taking the following measures to try to solve it:

1. Please make sure that the SIM card is not disabled.

Please search in the settings, enter the SIM card management, and ensure that the SIM card switch is turned on. Disabling the SIM card will cause the signal bar to display no signal or only one card signal.

Please make sure that you are in a good network environment.

Please try to change the current location.

(1) In some closed indoor environments, such as buildings with dense spacing, the cell phone signal may be blocked, resulting in no service.

(2) The network coverage of operators varies from region to region, and some regions may have insufficient coverage capacity, resulting in no mobile phone service.

If your mobile phone has no service in a specific area, or friends around you use the calling card of the same operator, it may be caused by the poor quality of your local network, and you can return to normal if you switch to other places.

3. Please avoid the interference of metal or magnetic materials.

If your mobile phone uses a special metal case, or if you are in an elevator, car or other environment, it is recommended that you take off your mobile phone case or leave the elevator, car and other environment. Metal and magnetic materials can easily interfere with signals, resulting in the failure of mobile phone service.

4. Please restart your phone or switch flight modes.

The special configuration of some networks may cause your mobile phone to stop, so you can resume it after restarting your mobile phone or switching flight modes.

5. Please reset APN.

Open the settings, enter APN in the top search bar, click APN to jump to the mobile data settings interface, click APN again, then click three or four points in the upper right corner, and select Try to reset to the default settings.

6. Please restore the network settings.

Search "Restore network settings" in Settings to try to restore network settings.

Tips: Restoring the network settings will delete the WLAN and Bluetooth connection records, and you need to enter the screen lock password for verification.

Please take out your mobile phone card.

(1) If your mobile phone card is cut by hand, it may cause signal problems due to irregular shape and poor contact. It is recommended that you bring your personal ID card to the operator's business hall to apply for a standard mobile phone card.

(2) Dirty or oxidized mobile phone cards can also lead to poor contact. I suggest you keep your mobile phone card clean.

Please upgrade your mobile phone system to the latest version.

It is recommended that you back up the data in advance (third-party applications such as QQ and WeChat need to be backed up separately) and update the mobile phone system version in time.

If your mobile phone still doesn't work, please contact Huawei's customer service hotline (950800) for more help, or back up your data in advance (third-party applications such as QQ and WeChat need to be backed up separately), bring relevant purchase vouchers and go to the nearby Huawei customer service center for testing.

Related links are as follows: Huawei Customer Service Center maintenance spare parts price inquiry, consignment service and reservation service.