Why can t I find the 4G signal sometimes when I use a Huawei mate10 phone?

Please check if the following conditions are met:

1. The mobile phone card is a 4G card that supports 4G network;

2. The mobile phone card has been activated for 4G traffic**, and it is not**replacement period, if it is**replacement period,**will generally take effect next month. (In some areas, you will not be able to use the 4G network after using **, please consult your local carrier for details of this function), and the operator has a 4G network and good signal in your area;

3. The phone supports 4G network, the mobile data switch and 4G switch are turned on, and select "4G 3G 2G Auto Selection" in "Settings > More > Mobile Network > Network Mode";

4. Please confirm that the 4G version of the mobile phone and the carrier of the card have corresponded. Generally speaking, the customized version of the mobile phone only supports the 4G service of the operator, for example, the customized version of China Telecom only supports the 4G network of China Telecom, and the customized version of the mobile only supports the mobile 4G network.

5. If you still can't use the 4G network after meeting the above conditions, you can try to change the mobile phone for testing: if you still can't use the 4G network normally after changing the mobile phone, please consult the mobile phone card operator; If you can use the 4G network normally after replacing your phone, please back up your important data and bring the purchase invoice to the outlet for testing.

If you can't use 4G, you can try to turn off the phone and restart it, if it still can't be used normally, you can check the mobile phone settings Mobile Network Mobile Data Options Voice and data to check whether the default is 3G, if so, you can re-select 4G, due to the difference in the specific path of each mobile phone type, the specific use method of your mobile phone shall prevail; Check to see if you've reached the rate limit or data cap. If you still can't use 4G, it cannot be ruled out that the conditions for use are not met. At present, the following conditions need to be met to use the China Unicom 4G network:

Condition 1] The mobile terminal supports the 4G network of China Unicom.

Condition 2] The current location has China Unicom 4G network coverage.

Condition 3] Use Unicom SIM card.

Condition 4] The number has opened the 4G Internet function (you can send SMS "KT4G" to 10010 to apply for activation, and the activation will take effect immediately).

If you still can't use it after meeting the above conditions, you can contact the local customer service to inquire whether the base station at your location is faulty and follow the guidelines.

If you are using a Huawei mobile phone, there are many reasons why the mobile phone does not have a 4G signal and only a 2G signal, please follow the following methods to troubleshoot:

1.If you have no 4G signal on the primary SIM card when you are using dual SIM, make sure that the supplementary SIM card is receiving MMS.

If you encounter a problem when the supplementary card receives SMS and MMS messages, the main card will display 2G:

1) You can enter the information interface, click on three dots or four dots, enter More > Settings > Advanced or Settings > Advanced, and then set Auto MMS to Off.

2) If your mobile phone supports dual VoLTE dual pass, it is recommended that you enable the Dual SIM VoLTE function: in the VoLTE network coverage area, when the dual HD icon is displayed in the status bar of the mobile phone, two cards can work at the same time.

2.Please make sure the 4G switch is enabled.

1) When installing a single SIM: Please swipe down from the top of the phone screen, open the shortcut menu, press and hold the mobile data icon, enter the settings interface, turn on Enable 4G or select 4G 3G 2G in network mode to automatically select.

3.Please move your current location.

You can consult the network coverage of the local operator, or observe the mobile phone network conditions using the same operator's SIM card nearby, if there is no 4G network in the same situation, it is generally caused by the poor and unstable 4G network coverage of the local operator, it is recommended that you try after moving to other places.

4.Please restart your phone or switch on and off airplane mode.

The special configuration of some networks may cause your phone to be unable to return to the 4G network for a short period of time, but it can be restored after restarting the phone or turning on the airplane mode.

5.Please reset the APN

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

It is recommended that you open Settings, enter APN in the search bar at the top, click Access Point Name (APN) to jump to the mobile data settings interface, click the Access Point Name (APN) again, then click the three dots in the upper right corner, and select Reset to Default Settings.

6.Please reset your network settings.

7.Please remove the SIM card.

1) If your mobile phone card is manually cut card, it may affect the signal reading due to non-standard shape and poor contact, it is recommended that you bring your personal ID card to the operator's business office to apply for a standard mobile phone card.

2) Dirty or oxidized SIM cards will also affect the reading of signals, so it is recommended that you keep the SIM card clean.

8.It is recommended to update to the latest system version in a timely manner.

If your phone still only has a 2G signal, contact Huawei Consumer Service** (950800), back up your data in advance (third-party apps such as QQ and WeChat need to be backed up separately), and bring your purchase voucher to a nearby Huawei Customer Service Center.

Boarding service. Repair spare parts** inquiry.

Huawei Customer Service Center.

The Mate 10 can't use the 4G network or doesn't show the 4G signal because it ticks 2G only in the phone's settings, and you can change it.

The specific hail lead operation steps are as follows:

<>4. Then click "Network Mode" in the "Mobile Network" page.

5. After the most sail dates, check "4G 3G 2G automatic selection" in the page of the "Network Mode" option, and then you can use the 4G network.