What should I do if the mobile phone card has no signal, what should I do if the mobile phone card h

If you are using a Huawei phone and the number of signal bars in the status bar is sometimes high or low, or the " " symbol appears on the signal bar, we recommend that you take the following methods to try to solve the problem:

1. Whether a magnetic protective shell, metal protective shell, magnetic bracket or magnetic chuck is used.

If your phone uses a metal case, magnetic case, magnetic stand, or magnetic chuck, it is recommended that you remove it and try it, as metal and magnetic materials can easily interfere with the signal and cause the phone signal to deteriorate.

2. Change your current location.

1. In some closed indoor environments, such as houses with dense building spacing, the mobile phone signal may be blocked, resulting in poor signal. You can get outside to test if your phone signal is back to normal.

2. The degree of network coverage of operators varies according to different regions, and urban areas basically meet the coverage, but some remote areas may have insufficient coverage capacity, which will lead to poor mobile phone signal. You can determine whether it is caused by network coverage problems by whether the mobile phone signal is poor when you are only in the same area or the mobile phone signal status of nearby friends using the same carrier** card.

3. Check whether the APN settings are correct.

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

2. Click the APN name to enter the APN setting interface.

3. Open the three dots in the upper right corner and click Reset to default settings.

Fourth, clean the SIM card and try to change the card cross-card.

1. Please take out the ** card to observe whether the metal surface is dirty or oxidized, and it is recommended to keep the ** card clean and try.

2. It is recommended that you change to another SIM card of the same operator, or change the SIM card to another mobile phone that supports this card. If the signal icons are all displayed as no signal, it is recommended that you go to the operator's office to check and replace the SIM card with a new one.

5. Reset network settings.

This operation will delete Wi-Fi and Bluetooth records.

If the problem persists after trying the above methods, we recommend that you back up your data in advance (WeChat and QQ must be backed up separately) and bring the relevant purchase voucher to a nearby Huawei Customer Service Center for testing.

For mobile phones, as long as they are in a normal living environment, they can generally chat and talk online. However, some friends may encounter a situation where the mobile phone suddenly has no signal, and they don't know where to start, and they are very distressed in an instant, and they don't know what to do. Friends who are accustomed to using mobile phones have no way to contact friends and family, and they can't access the Internet, as if it's the end of the world.

So what's going on? What are we going to do. Let's take a look.

1. The nearby signal is not good.

Ask someone nearby to determine if the signal quality is poor in the neighborhood. This is also not uncommon, both in cities and in mountainous areas. If the situation is more serious, it is recommended to contact the operator for a solution.

Second, the signal is blocked.

In some large exams or near the security center, there is a signal blocking device, and if the mobile phone arrives here, no matter how good the performance is, there will be no signal. Please see if there is such a shielding device nearby.

3. There is a problem with the SIM card.

If the SIM card is used for too long, the surface of the card will be worn to a certain extent, which will lead to unstable signal, you can take out the card and replace it on other mobile phones to try, determine the problem of the SIM card, you can go to a larger business hall to apply for a replacement card.

Fourth, the SIM card has been maliciously copied.

There is also a possibility that the SIM card has been maliciously copied by criminals. Especially when you have a lot of online banking, some criminals may maliciously copy your SIM card through the network, and then steal your online banking through the copied SIM card. At this time, your SIM card has no signal.

5. Whether a metal mobile phone case is used.

In fact, many mobile phone shells sold now are plastic, silicone this insulating substance, this is no problem, but there are also people who usually have a high damage index, in order to avoid the mobile phone from breaking, the use of that thick shell, metal shell to cause serious interference and shielding of wireless signals.

6. Temporary failure of mobile phone.

This happens from time to time, and it can be more frequent when your phone is not performing well. Turn airplane mode on and off or turn it off, or turn it off and restart.

7. The mobile phone antenna is broken.

Every mobile phone has an antenna that is used to receive signals. If there is a problem with the antenna and the signal cannot be received, the phone will show that there is no signal. At this point, you'd better change your phone.

8. Mobile phone performance problems.

Some mobile phones have signal problems by themselves, and it is recommended not to buy such phones as much as possible.

If we encounter a situation where the mobile phone suddenly has no signal, we may wish to check through the above situations to see if it is because of the mobile phone signal or the SIM card problem, or the problem of the mobile phone, these three problems can be checked and solved, and the general problem will be solved quickly, so you don't have to worry too much. If there is a sudden lack of signal on the mobile phone, we must solve it as soon as possible, otherwise there may be a situation where the mobile phone information such as the relevant bank and chat software password is stolen, thinking that our information is basically linked to the mobile phone number.

Hello, the mobile phone card has no signal, you need to see if it is a problem with the contact with the mobile phone, after shutting down, take out the mobile phone card and plug it in, or put it in other card slots to test it, if there is no problem, you can also look at the relevant settings of the mobile phone, or whether it is the cause of arrears.

Method 1: You can press and hold the power button of your phone to try to restart, some phones may need to find reboot in the settings.

The phone card has no signal, we can restart the device, then take out the card tray and reinstall the card.

You can also put the card on another mobile phone to see if it is a card problem.

If the mobile phone card has no signal, it should be a problem with the network, you can contact the operator.

If the mobile phone card has no signal, it may be caused by no fee, and some phone bills should be paid.

The mobile phone card has no signal, which proves that the signal in this area is not good, or your mobile phone signal is not good.

If there is no signal on the mobile phone card, it may mean that your mobile phone cannot read your card, or it may be that there is no signal in the place where you are.

The mobile phone card suddenly has no signal, so the elderly can also learn it if they try to do it.

The signal will be affected by various factors such as topography, landform, and tall buildings during propagation, 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.

1. Reasons for poor network quality.

If the same phenomenon occurs in the vicinity of mobile phones using the same carrier card, it may be caused by poor network quality in the current location.

2. Check your phone settings.

Open your phone's shortcut bar (scroll up at the top or up at the bottom) to see if data is turned on.

3. Confirm the status of the mobile phone card.

Please make sure that the balance of the mobile phone card is sufficient, if the payment is in arrears, please restart the mobile phone after the recharge is successful. Check with your carrier to see if the data** has reached the data limit. If necessary, you can change the SIM card that can access the Internet normally to confirm.

4. Check the mobile phone signal.

If your phone uses a metal, magnetic case or bracket that has an impact on your phone's signal, we recommend that you remove it and try it.

5. Check the network settings.

Please go to Mobile Settings - Mobile Network Dual SIM and Mobile Network - Mobile Unicom Telecom Radio and Television - Access Point (APN) and click here"Reset to the default settings"restart your phone.

6. Resetting network settings will delete and disconnect the connection, pairing records of WLAN, mobile data network, Bluetooth and other networks, you can go to Settings - System Management - Backup and Reset - Reset Network Settings - Enter the lock screen password.

7. You can enter the Settings - System Management - Backup & Reset - Restore All Settings - Restore and Restore Settings option. This operation will not delete the ** file, it will cancel the password, restore all settings, including: set wallpaper, unlock style, wifi, default open program, etc., and the logged in software account also needs to be logged in again.

Note: Go to Cloud Service - Device Cloud Backup - Backup Data Type - System Data - Return - Back to Back Up Now to back up some system settings and desktop layout; Cloud service--Data synchronization--Turn on WLAN, Bluetooth, etc. to synchronize data to cloud service.

If you are using a Huawei phone and the " " symbol appears on the signal bar of the mobile phone, we recommend that you take the following methods to try to solve the problem:

1.Please make sure that the SIM card is not disabled.

2.Make sure you are in a good network environment.

Try changing your current location.

1) In some closed indoor environments, such as houses with dense spacing between buildings, the mobile phone signal may be blocked, resulting in no signal.

2) The network coverage of operators varies according to different regions, and some areas may have insufficient coverage capacity, resulting in no mobile phone signal.

If your mobile phone has no signal in a specific area, or if a nearby friend's mobile phone with the same carrier** card also has no signal, it may be caused by poor network quality in your location, and it can be restored to normal after changing to another place.

3.Please avoid interference from metal or magnetic materials.

If your mobile phone uses a special metal protective case, or you are in an elevator, car and other environments, it is recommended that you remove the mobile phone protective case or leave the elevator, car and other environments, metal and magnetic materials are easy to interfere with the signal, resulting in no signal on the mobile phone.

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

Special configurations of some networks may cause your phone to lose signal, which can be restored after restarting your phone or turning on airplane mode.

5.Please reset the APN

Open Settings, enter APN in the search bar at the top, tap Access Point Name (APN) to jump to the mobile data settings interface, tap Access Point Name (APN) again, then tap three or four dots in the upper right corner, and select Reset to Default Settings to try.

6.Please reset your network settings.

7.Please remove the SIM card.

1) If your mobile phone card is manually cut, there may be signal problems due to non-standard 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) Dirty or oxidized SIM cards will also lead to poor contact, so it is recommended that you keep the SIM card clean.

8.Please update your phone system to the latest version.

If your phone still has no signal, contact Huawei Consumer Service** (950800) for further assistance, or back up your data in advance (third-party apps such as QQ and WeChat need to be backed up separately), bring your purchase voucher, and go to a Huawei Customer Service Center near you.

Repair spare parts** inquiry.

Make an appointment for service. Boarding service.

Check whether the card is inserted correctly, see if the mobile phone card switch is turned on in the settings, and if not, go to the place where the card is issued and ask a professional.

The mobile phone card suddenly has no signal, so the elderly can also learn it if they try to do it.

Hello, please wait a moment.

If the mobile card suddenly loses signal, it is most likely that it is in an underground garage, elevator, or remote mountainous area and other areas with poor signal coverage, or the SIM card is loose, and you can replace it with a new one.

Check whether there is a signal for friends around you with mobile phones, if other people's mobile phones also have no signal, it may be a problem with the local network base station, it is recommended to contact the local business hall to deal with it.

Try it with a mobile phone card inserted into other friends' mobile cards, if it doesn't work to insert other cards, then it may be a mobile phone system problem, it is recommended to contact the mobile phone after-sales service.

If you plug in other cards with signals, but you can't insert your own card, then it may be a problem with your own card, and it is recommended to take your mobile phone card to the local mobile business hall for testing.

Dear, you can refer to it.

You can turn off your mobile phone first, and then turn it on to try it, or go to the business hall again to apply for a mobile phone card.

The ways to deal with the mobile phone card no signal are: restart the mobile phone, confirm the network, check the phone bill, check the SIM card, check the traffic, go to the mobile phone repair point, etc.

1. Restart your phone.

You can turn off the phone for 3-5 minutes, restart the phone and try again.

2. Confirm the network.

Check if you have an internet connection, and we recommend that you use it in a place with a strong signal.

3. Check the phone bill.

Check whether there is still a phone bill, if the balance is insufficient, you need to recharge before you can use it.

4. Check the SIM card.

Check whether the SIM card is inserted, if it has been inserted but still cannot be used, it is recommended that you go to the business office to check whether the USIM card is faulty, or replace the card for testing.

5. Check the flow rate.

If the usage data reaches the maximum value in the current month, the network will be automatically shut down, it is recommended that you pay attention to the SMS reminder or check the **product description. Swiftness.

6. Go to the mobile phone repair point.

If none of the above problems occur, the shed rent may be a hardware failure of the mobile phone, and it is recommended to go to the after-sales maintenance outlets of the old mobile phone to deal with it. <>