Huawei P30 mobile phone suddenly changed to 2G network

If the 4G coverage area is exceeded, it will be automatically converted to 3G. Open Settings and find Mobile Networks.

The mobile network suddenly became 3G

The 4G signal in the location is not covered, only the 3G signal is covered, so the mobile phone can only use the 3G signal.

There is a problem with the parameter setting of the three 234G networks in this area.

If there is an abnormality in the phone system, just restart the phone.

Change the mobile network type setting. If the mobile phone network type is set to only use the 3G model, then the mobile phone will turn off the 4G Internet access and only use the 3G Internet access, in this case, you can change the network type in the mobile phone settings, change it to 4G priority, and you can resume the 4G Internet access.

Extend. Huawei P30

The phone is very good, and the parameters of the phone are as follows:

1. Screen: Inch screen, resolution FHD+ 2340*1080 pixels, more vivid colors, clearer colors. Bring a wider vision and an immersive film and television game experience.

2. Camera: Rear-mounted Leica.

Triple camera 40 million pixel super sensitive camera (wide angle, f aperture) + 16 million pixel ultra wide angle camera (f aperture) + 8 million pixel telephoto.

Camera (F-aperture, OIS) with autofocus.

Laser focus, phase focus, contrast focus), support AIS image stabilization. The front single camera has 32 million pixels and f aperture, making it more beautiful to take pictures.

3. Performance: The mobile phone adopts EMUI based on Android 9) operating system and is equipped with Kirin 980

8-core processor, multiple applications run at the same time without pressure, and the game runs more smoothly.

4. Battery: Equipped with 3650mAh (typical value) large-capacity battery, with long battery life.

If there is a problem with the mobile phone card or mobile phone network settings, you can try to use other SIM cards on the mobile phone, or load the SIM card on the mobile phone into other mobile phones to check, if it is a problem with the mobile phone card, you need to go to the business hall to remake one, if it is a mobile phone problem, you need to close the network settings, and then reconnect to try, if it is still invalid, you can back up the mobile phone data and restore the factory settings. Huawei has 1Payment Protection Center:

The built-in Payment Protection Center of Huawei smartphones can protect payment, **, and banking applications, and automatically detect, isolate, and repair malicious applications or operations when they are added to the Payment Protection Center, improving the security of use. If you still feel that it is not safe enough, there is also Deep Protection, and the apps added to Deep Protection will not be able to take screenshots, screen recordings, etc. With the Payment Protection Center, you never have to worry about app security again2

Play skills:Here is a list of how to use all aspects of Huawei mobile phones,Including photography、Office、Security、Personalization, etc.,Each function provides dynamic demonstration、Step-by-step explanation is displayed in great detail,Click "Try Now" to go directly to the location of the function。 With the skills of playing the phone, it can help us use Huawei phones better.

3.Service: Service is a built-in app on Huawei mobile phones, which provides many functions, such as Huawei customer service, which can provide users with services in a timely manner; By upgrading the early adopter feature, you can experience Huawei's latest system updates in a timely manner. It also automatically detects performance ...... in all aspects of the systemThe power of this app is too powerful.

4.Smart Vision: Smart Vision is a very useful feature of Huawei mobile phones, in any application interface, you can open Smart Vision by swiping your finger up from the bottom right side of the screen.

It has four functions, namely scanning codes, translating, shopping, and recognizing things, which are very practical. For example, in translation, the camera can be directly translated by pointing at the text to be translated, and it can be translated without taking a shot. 5.

Healthy use of mobile phones: This function is in the settings. It shows you how you use your phone each day, how many times you've unlocked, how much time you spend on each app, and more.

It can also limit the amount of time you spend using an app and how long you can use your phone, which is a great feature for undisciplined or kids, and can be a good solution to the problem of addiction to playing on the phone.

Please try to solve it as follows:

1. SIM card problem.

If your SIM card is clipped, in arrears, has not opened 4G service, or has a special SIM card, your mobile phone may not be able to use the 4G network or not display the 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 manually modified APN to use Jingcha, a traffic card of China Telecom, which can only be used on the mobile phone that inserts this card for the first time4G, and cannot be used to replace the mobile phone4G.

2. Operator issues.

If you are using a carrier-specific 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 a 4G signal.

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 case and try again, if the signal returns to normal, we recommend 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 & Network > 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.

Huawei's mobile phone network has suddenly changed from 4G to 2G, that is, you are now judging that Huai is digging and clearing the area, and there is no such 4G network or 4G network is not popular, and the signal is too poor, so it will become a 2G network before the judgment.

What should I do if Huawei's mobile phone network suddenly changes from 4G to two Gs? I think this is a network.,It should be a restriction problem for Wu to dismantle and sell.,So it's directly changed from 4G to 2G.,That is.。 There aren't too many models that don't have internet access anymore.

The mobile phone suddenly changed from 4G to 2G, I think in this case, is there a problem with your monthly traffic.

What should I do if Huawei's mobile network suddenly changes from 4G to 2G? If the Huawei mobile phone suddenly changes from 4G to 2G, it may be that there is a problem with your **card, it may be **card, this banquet has been noisy for a long time, and the wear and tear is serious, so he has a problemWhat should he do if the network of Huawei's hand rubber machine suddenly changes from 4G to 2G? If the Huawei mobile phone suddenly changes from 4G to 2G, it may be that there is a problem with your **card, it may be a **card, this has been used for a long time, and the wear and tear is serious, so he has a problem, at this time you can go to this mobile, this communication equipment, this company's business hall to check, is there a problem with this **card?

Hello friend, this may be a model of Jane Dan pants is where you are in a bad signal to try in another place, thank you, I hope mine can help you high scum.

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.

It is recommended to try restarting, this problem is very common on Apple mobile phones, and it can be restored by restarting, and the same is true for Huawei mobile phones. If you don't restart, then after a while, the phone will also return to 4G

In this case, you can check whether the number is in arrears.

If there is no arrears, turn off the computer and start it again.

If the local 4G signal is normal, the phone can be back to normal.

The first scenario may be due to a sudden drop in signal due to a poor network signal.

In the second case, the operator shuts down the network due to insufficient phone bills, resulting in 4G becoming 2G.

It may be because your signal is not very good, it is recommended that you try it in a different place with a better signal.

It would be nice to have a different phone. If you don't believe it, go buy a Xiaomi, OPPO, vivo, Apple to try.

No, there's no need to worry.

There are several possibilities for 4G to 2G:

The arrears of the mobile phone will become 2G, and you can renew it.

The antenna buckle of the motherboard of the mobile phone is loose, disassemble the phone, and re-buckle it.

Poor signal in your location. Rural remote areas. Just find a place with a good signal.

Hello dear. What kind of operator is it?

Questions. Move.

Check whether you are in arrears.

Questions. I didn't have to pay the fee a long time ago.

You can turn the airplane mode on and off.

Questions. On airplane mode shows up 4G

It's been back to normal recently, isn't it?

That's fine.

It is caused by an unstable signal.

Questions. Thank you.

No matter what mobile phone, as long as the network remains the same, generally 4G will not become 2G, you know what I mean? Unless it's a 4G network, the 4G network will be displayed. But when the 4G network signal is not good, he will show that 3G2G means this. So it's normal.

Suddenly it changed from two sections to four sections, and it should be the two of us who will do it first, and then I will consult the street.