The mobile phone shows the 4G network, but it can t be used, what is the reason?

If you are using a vivo mobile phone, the troubleshooting method for not being able to use the 4G network is as follows:

1. Enter Settings - Mobile Network (Dual SIM and Mobile Network) - Mobile Unicom Telecom - Network Mode, 4G Mobile Phone Selection: 4G (Priority) 3G 2G, 5G Mobile Phone Selection: 5G (Priority) 4G 3G 2G;

Note: If you can't see the network mode through the above methods, you can enter * * to view the network mode through the dial pad.

2. Confirm whether to use third-party magnetic or metal accessories.

Please check whether you use metal protective shells, magnetic protective shells, magnetic brackets and other accessories, metal and magnetic materials are easy to interfere with signal reception, it is recommended that you remove the accessories to view.

3. Check whether the current environment covers the operator's network.

You can observe the mobile phone signals of the same operator's network in the surrounding area, and if there is no 4G network, it is caused by the operator's imperfect 4G network coverage. In a closed indoor environment (e.g., basement, elevator, etc.) or in a relatively remote area, the operator's network may not be fully covered.

4. Restart your phone or switch on airplane mode.

In some areas, the network configuration may cause the phone to fail to return to the 4G network in a short period of time, so you can restart the phone or turn on the airplane mode to try.

5. Check the SIM card and perform cross-card verification.

Observe whether there is dirt or oxidation on the metal surface of the SIM card, and check it after cleaning. If you use a tailor-made SIM card, it is recommended to replace it with a standard SIM card. Install the SIM card to another device, or install another SIM card to your mobile phone for comparison and testing to determine whether it is a SIM card failure.

If it is a SIM card reason, it is recommended that you go to the operator's office to replace the card.

6. Upgrade the system or reset the network settings.

Please upgrade your phone to the latest version, if your phone is already the latest version, it is recommended that you go to Settings - System Management - Backup & Reset - Reset Network Settings - Mobile Unicom Telecom - Reset Settings, and then use it to view.

Note: Resetting network settings resets Wi-Fi, mobile data, and Bluetooth connection records.

7. Service center testing.

If the above methods fail to solve your problem, please back up your mobile phone data in advance, bring your mobile phone and purchase voucher to the vivo customer service center for testing, pay attention to WeChat***"vivo" or "vivo customer service" to inquire about the service center address**, it is recommended to contact before going to ensure that there is a staff to receive you and then go over, so as to avoid delaying your precious time and letting you run in vain.

Hello, if you are a China Unicom mobile phone number user, the mobile phone displays 4G

But can not go to the Internet normally, please check whether the mobile phone signal is normal, if normal and no arrears, the Internet function is open, all web pages can not be opened normally, in different addresses are the same, it is recommended to switch on and off the mobile phone to try, if it still does not work, it is recommended to contact the attribution 10010 manual customer service consultation and feedback, thank you!

If you are using a vivo mobile phone and the mobile phone cannot use the 4G network, you can check it by following the following methods:

1. The mobile phone needs to use the operator's SIM card corresponding to the supported 4G network;

2. Check whether the SIM card used has opened the 4G network**;

3. Confirm whether the local coverage is the 4G network of the operator to which the SIM card belongs, and you can also change the network environment to observe;

4. Check whether the mobile phone is enabled in 4G network mode, enter the mobile phone settings - mobile network dual SIM and mobile network - network mode to view, some models need to be entered in the dial pad: * * view;

5. Turn off the data network, wait for a few minutes and then turn it back on for observation.

6. Go to Settings - Mobile Network Dual SIM and Mobile Network - Access Point (APN), select "Reset to Default Settings", and then shut down and restart to try;

7. Reset the mobile phone network, first set the network to 2G, wait for the network to stabilize, and then set it to 4G, and then restart the phone.

If your phone shows 4G but can't access the internet, it may be due to the following reasons:

1. Unstable network signal: If the network signal is unstable in your place, it may cause the mobile phone to display 4G but not be able to access the Internet.

2. Operator network problems: If your mobile phone is mobile data traffic or the network is not good, it may cause the mobile phone to display 4G but cannot access the Internet.

3. APN setting error: If your APN (access point name) is set incorrectly, it will also cause the hand to let the machine display 4G but cannot access the Internet.

4. Mobile phone setting problem: There may be a problem with your mobile phone settings, such as turning off data traffic or turning on the power saving mode.

Here's how to fix it:

1. Move to a place with a better network signal and try again.

2. Unplug the phone card and restart the phone or turn off the phone and restart the phone.

3. Check whether the APN settings of the mobile phone are correct, and try to delete and re-add the APN.

4. Check whether the data traffic of the mobile phone is turned on, and turn off the provincial and horizontal power mode.

If none of the above methods solve the problem, you can contact your marketing customer service for assistance.

If your phone cannot access the Internet with data data, it is recommended to perform the following steps:

1. Check whether the SIM card is enabled for GPRS Internet service or temporarily closed.

To use the mobile phone data Internet function, the ** card needs to activate the data data Internet service. You can contact the local network provider of **card to open the data traffic Internet service. Wu sells.

2. Check whether the "Mobile Data" switch is turned on.

Slide your finger down on the top curtain of the screen and turn the "Movement Data" dot green.

If the problem persists, it is recommended that you bring the purchase invoice, repair card and mobile phone to the local service center for professional engineers to help you test.

Data expansion: 4G is a combination of 3G and WLAN, and can quickly transmit data, high quality, audio, and image stupid orange brother. 4G is capable of speeds of more than 100Mbps**, which is 25 times faster than today's home broadband ADSL (4 megabytes) and can meet the requirements of almost all users for wireless services.

In addition, 4G can be deployed in places that are not covered by DSL and cable modems before being extended to entire regions. Obviously, 4G has incomparable advantages.

It must be 4G, and then go to the business hall to apply for activation before you can use it.

First, your phone must be 4G. Second, 4G data must be enabled**.

Dear, there are several conditions that are required to use the 4G network: mobile phone card.

3.There is a 4G signal in the local area.

4.You have 4G data activated**.

You can use a 4G card, but you can't get on the 4G speed.

If your phone does not have a 4G signal and only has a 2G signal for multiple reasons, 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.