Why doesn't my mobile phone have a 4G signal and only displays a 2G signal?

If your mobile phone has no 4G signal but only 2G signal, there are many reasons. Please check as follows:

1. If you are a dual card and the main card has no 4G signal, please confirm whether the auxiliary card is receiving MMS.

If the secondary card encounters the problem of receiving SMS and MMS, the primary card will display 2G:

(1) You can enter the information interface and click three or four points to enter more >; Settings > Advanced or Settings > Advanced, and then set the automatic downloading of multimedia messages to off.

After selecting Close, when the secondary card receives the multimedia message, you can manually click to download the multimedia message when the primary card is not online.

(2) If your mobile phone supports dual VoLTE communication, I suggest you turn on dual-card VoLTE function: when the dual HD icon is displayed in the status bar of the mobile phone in the coverage area of VoLTE network, both cards can work at the same time.

2. Please ensure that the 4G switch is enabled.

(1) When installing a single card: Please slide down from the top of the phone screen, open the shortcut menu, press and hold the mobile data icon, enter the setting interface, turn on enabling 4G or select 4G/3G/2G automatic selection in network mode.

Tips: If the 4G switch or network mode option is not turned on, it means that 4G is turned on by default, and there is no need to set it.

(2) When installing dual card: Please open the settings of the mobile phone, enter dual card 4G in the top search bar and click Jump, and turn on the switch to enable dual card 4G.

Tips: If the search result is empty, it means that dual-card 4G has been turned on by default, and no setting is required.

3. Please move the current position

You can consult the network coverage of local operators, or use the SIM card of the same operator to observe the surrounding mobile phone networks. If there is no 4G network, it is generally caused by poor and unstable coverage of the 4G network of local operators. I suggest you move to another place and try again.

4. Please restart your phone or switch flight modes.

The special configuration of some networks may cause your mobile phone to be unable to return to the 4G network in a short time, so it can be restored after restarting the mobile phone or switching flight modes.

5. Please reset APN.

Incorrect APN settings will affect the normal use of the network.

I suggest you open the settings, enter APN in the top search bar, click APN to jump to the mobile data setting interface, then click APN, then click three points in the upper right corner, and select Reset to default settings.

6. Please restore the network settings.

You can go to Settings, search to restore network settings, and then click 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 manually, it may affect signal reading 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) The dirty or oxidized mobile phone card will also affect the reading of signals. I suggest you keep your mobile phone card clean.

8. It is recommended to update to the latest system version in time.

If your mobile phone is not the latest version, please back up the data in advance (third-party applications such as QQ and WeChat need to be backed up separately). It is recommended to update to the latest system version in time where there is a network.

If your mobile phone still only has 2G signal, please contact Huawei's customer service hotline (950800), or back up the data in advance (third-party applications such as QQ and WeChat need to be backed up separately), and bring relevant purchase vouchers to the nearby Huawei customer service center for testing.

The related links are as follows: Huawei Customer Service Center sends maintenance service, makes an appointment for service, and inquires about the price of maintenance spare parts.