I m a 4G card, why does it show 2G

The signal will be affected by various factors such as topography, landform, tall buildings, etc., and if you are in a relatively closed place, the signal will be affected. Here's how to deal with it:

1. Turn the phone on and off again;

2. Swap the SIM card to a family member's or friend's phone and try again;

3. Check to see if there is a signal from other Unicom users around.

Please try to solve it as follows:

1. SIM card.

Issue. If your SIM card is clipped, in arrears, and has not activated 4G service, special SIM card may cause your phone to not be able to use the 4G network or not display 4G signal.

Solution: If it is a clipping card, please replace it with a standard SIM card.

If the SIM card is in arrears, please pay the fee before using it.

If the SIM card does not have 4G service enabled, please change it to support 4G network.

and ensure that the 4G service has been activated, consult the operator for details.

If it is a special SIM card, it is currently found that some data cards that can only be used for Internet access have some restrictions on the use of 4G. For example, a traffic card of China Unicom needs to be used after manually modifying the APN, and a traffic card of China Telecom can only be used on the mobile phone that inserts this card for the first time4G, and 4G cannot be used to replace the mobile phone.

2. Operator issues.

If you are using a carrier-specific mobile phone and there is no 4G network in the local area, it may cause your phone to not be able to use the 4G network or not display the 4G signal in stealth.

Solution: If you are using a customized mobile phone from an operator, some mobile phones can only use 4G with the SIM card of the corresponding operator, for example, some customized versions of China Telecom only support the use of China Telecom 4G with a China Telecom card, and you cannot use China Unicom 4G when using a China Unicom card, at this time, please use the ** card of the corresponding operator.

If there is no 4G network in your area, please check with your carrier for details.

3. Mobile phone case problem.

If you use a metal case to protect your phone, it may interfere with the signal because the metal shields the signal, which may cause your phone to not be able to use the 4G network or not display a 4G signal.

Solution: Please remove the metal protective case and try again, if the signal is back to bright and normal, it is recommended that you replace it with another protective case.

3. Mobile phone setting problems.

If you don't set it up correctly in your phone's settings, it may interfere with the signal and may cause your phone to not be able to use the 4G network or not display a 4G signal.

Solution: Go to Settings > Wireless & Networks > Mobile Networks.

Enable 4G (some mobile customized models do not have a 4G switch, the system turns on 4G by default), and make sure that the 4G switch of the mobile phone is turned on.

Go to Settings > Wireless > Mobile Network > Set the network mode to 4G 3G 2G (some models or EMUI versions do not have this setting).

Remarks: 1. Models with dual SIM and 4G are not supported, and the secondary card is not supported.

4G is not available. You can choose which card to use as the 4G card by switching the primary and secondary cards.

2. If the VoLTE service of the relevant operator is not activated, it will fall back to 2G and 3G signals during calls, which is a normal phenomenon.

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 remove the SIM card.

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

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

3.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.

4.Please move your current location.

If there is no 4G network, it is generally caused by poor and unstable 4G network coverage of the local operator, so it is recommended that you move to other places and try it.

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

The special configuration of some networks may cause your phone to not be able 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.

6.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.

7.Please reset your network settings.

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.

Repair spare parts** inquiry.

Make an appointment for service. Boarding service.

The mobile phone shows 2G network smart quietly, this is because the mobile phone 4G network function is not turned on, you can re-set to turn on the 4G network function, the specific process is as follows:

1. Take the Redmi Note4G mobile phone as an example, open the "Settings" option in the standby interface and enter the next step.

2. In the settings interface, open the option of "Moving the Slag Network" to enter the next step.

3. In the mobile network settings interface, open the "Network Type Selection" option to enter the next step.

4. In the Xunyou network type interface, select the "4G network priority" option to complete the default 4G network opening setting of the mobile phone.

This means that the signal around you is too poor, but if you have a two-machine network, you can't connect to the Internet, so you only have basic call functions.

There is a possibility of two coincidences like cherry blossoms.

First, your phone does not support 4G networks, and only supports 2G at most.