What s going on with the mobile phone card without service, what s going on with the mobile phone ca

Mobile phone communication is to send and receive signals through the network base station, and then communicate with the called party, such as the mobile phone shows no service may be related to the following conditions:

1. The SIM card of the mobile phone is in poor contact with the shneme of the mobile phone card slot, resulting in the failure of the SIM card circuit and the inability of the mobile phone to communicate with the network base station.

2. The mobile phone is incompatible with the system due to the application software for installation, resulting in the system software closing the modem in the mobile phone signal processing circuit, at this time you can turn off the mobile phone and then restart, the modem in the mobile phone signal circuit will be restarted, and after the signal is normal, delete the suspicious mobile phone application software installed before the problem.

3. The SIM card of the mobile phone is not registered in the network, at this time, you can insert this SIM card into another mobile phone, if it also shows no service as the reason for the SIM card.

4. If the SIM card of the mobile phone is accidental, and there is no signal in the network signal coverage area, it fails to reconnect to search the network and merge the book, at this time, you can manually search for network registration under the menu of Settings - General - Network - Network Operator.

5. If the signal coverage of the mobile phone SIM card network operator is not available, you can change the location to an open area, and then check the mobile phone signal grid display, if the display is normal after changing the location, you can call the network operator service ** for feedback and complaints.

6. **The card has been used for too long, and with a valid certificate, you can go to the local business hall to reapply for a card.

The SIM card of the mobile phone is in poor contact with the shrapnel of the mobile phone card slot, resulting in the failure of the SIM card circuit, and the mobile phone cannot communicate with the network base station.

If you are using a Huawei phone and the phone shows no service, we recommend that you take the following methods to try to solve the problem:

1.Avoid using magnetic metal cases, magnetic stands, or magnetic chucks.

Metal and magnetic materials are easy to interfere with the signal, resulting in no service for the mobile phone.

2.Please try to change to another SIM card.

It is recommended that you install other mobile phone cards into your mobile phone to view, if the signal display of other mobile phone cards is normal, it may be that there is a problem with your mobile phone card, it is recommended that you go to the operator's business office to replace a new mobile phone card.

3.Please try moving to your current location.

1) In some more closed indoor environments, such as houses with dense spacing between buildings, the mobile phone signal may be blocked, resulting in no service. You can get outside to see 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 no service for mobile phones.

You can determine whether the current regional network coverage is caused by poor network coverage by whether the mobile phone is not available in the same area, or whether the mobile phone using the same carrier** card in the vicinity is also not available.

4.Check that the APN settings are correct.

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

Method 1: aClick Settings;

c.Click on the APN name (APN) to go to the APN page.

d.Turn on the three-dot button or four-dot button in the upper right corner;

e.Click Reset to default.

Method 2: If your phone is EMUI and above or Magic UI and above, or HarmonyOS and above, you can also follow the steps below:

a.Click Settings;

b.Tap Mobile network, then tap Mobile data;

c.Click on the APN name (APN) on the Mobile Data page to go to the APN page.

d.Turn on the three-dot button or four-dot button in the upper right corner;

e.Click Reset to default.

Settings > Wireless & Networks > Mobile Networks > Access Point Name (APN) > turn on the three dot buttons in the upper right corner > reset to default.

5.Please try to reset the network settings.

If the above troubleshooting does not resolve your issue, we recommend that you contact Huawei Consumer Service** (950800) for further assistance, or back up your data in advance (WeChat QQ and other apps need to be backed up separately), and bring your purchase voucher to a Huawei customer service center near you.

Generally, this word will appear in the case of a bad signal, but it is not excluded that the mobile phone card is broken, if you are sure that there is no problem with the signal here, it is recommended that you go to the business hall for consultation.

The SIM card of the mobile phone is in poor contact with the shrapnel of the mobile phone card slot, resulting in the failure of the SIM card circuit, and the mobile phone cannot communicate with the network base station.

The reasons for the lack of service are as follows;

1.Damage to the SIM card leads to no service due to inability to read the SIM card, 2The hardware failure of the mobile phone leads to the inability to read the SIM card resulting in no service, 3

Software conflict resulting in inability to read the SIM card resulting in no service, 4There is no signal coverage in the area, resulting in no service.

Resolution; 1.Go to the business hall to make up for a new card to use, 2Go to a nearby mobile phone store or after-sales inspection and repair.

3.Delete the relevant software or restore the factory settings directly.

4.Change the place where the signal is good, and there will be a service signal.

If you are using a vivo mobile phone, you can troubleshoot it as follows:

1. Please check the status of the SIM card** to ensure that the SIM card is not in arrears or cancelled.

2. 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 to remove the accessories to view.

3. If you are in a closed indoor environment (such as basement, elevator, etc.), the mobile phone signal may be blocked, resulting in no signal, you can go to the outdoor environment to check. If you are in a remote area and the carrier network may not be covered, you can determine whether the network coverage is due to the mobile phone signal that uses the same carrier network in the surrounding area.

4. 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 into other mobile phones that support this card for comparison test, if there is no signal, it is recommended to consult the operator for processing.

5. Confirm whether the mobile phone supports the mobile phone card of the corresponding operator.

6. Check your phone settings.

Airplane mode: Check whether there is an "Airplane" icon in the status bar of your phone, if there is an "Airplane" icon, please go to [Settings] or [Settings > Other Networks and Connections] to turn off "Airplane Mode".

Switch data card: If the phone has dual SIM installed, and one of the cards has no signal, please go to [Settings] Dual SIM and mobile network to switch whether the data card can be restored.

7. Go to Settings - System Management - Backup and Reset - Reset Network Settings - (Select the corresponding SIM card) - Reset Settings, and then use to view.

Note: Resetting the network settings will delete and disconnect the connection and pairing records of WLAN, mobile data network, Bluetooth and other networks, it is recommended to back up the data such as WiFi and password before operation, you can enter the cloud service - data synchronization - turn on WLAN, Bluetooth, etc. to synchronize data to the cloud service; Go to "Cloud Services" -- Device Cloud Backup -- Backup Data Type -- Open "System Data" -- Return to the previous page -- Back up now to back up some system settings data.

8. If there is no "Reset Network Settings" menu option on the mobile phone, you can go to Settings - System Management More Settings - Backup & Reset Factory Reset - Restore All Settings - Restore.

Note: Restoring all settings will not delete any data or files, only all settings of the phone will be restored, some third-party application accounts need to be logged in again, please confirm that it does not affect the use of the software before operating. For the security of mobile phone data, it is recommended to back up mobile phone data in advance before operation.

9. If the above methods cannot be solved, please back up the important data on your mobile phone in advance and bring your mobile phone to the vivo customer service center.

Detection processing. Tips: It is recommended to bring relevant purchase vouchers (such as: purchase invoice, warranty card, ID card) when you go, and consult the staff of the consulting center in advance to ensure that the staff go again during normal working hours, avoid empty running, and pay attention to safety on the way to and from the service.

There is no service for the mobile phone card, mainly due to the following reasons:

1. The SIM card of the mobile phone is faulty

To detect it, we just need to put the SIM card into another phone to see if it can be used normally.

2. The SIM card of the mobile phone is not in good contact with the mobile phone

In this case, it is mainly due to foreign objects on the mobile phone card, take out the SIM card on the mobile phone and clean the mobile phone card slot, wipe the SIM card, and then put it into the mobile phone.

3. The mobile phone is malfunctioning

We put the SIM card of other mobile phones into the mobile phone and observe whether it can be used normally, so as to troubleshoot the mobile phone.

4. There is no mobile phone signal at present, which shows no service status

If there is a cell phone signal around the mobile device, then it will also be one of the above faults.

The SIM card of the mobile phone is in poor contact with the shrapnel of the mobile phone card slot, resulting in the failure of the SIM card circuit, and the mobile phone cannot communicate with the network base station.

If you can't read it with other cards, it may be that the card slot is broken, and the phone is a problem.

There is no signal or the SIM card is not read.

Question: What is the reason for the sudden lack of service on Huawei mobile phones?

What happens when Huawei mobile phone suddenly has no service?

2.If it is a dual-SIM phone, please check whether the SIM card is activated: Settings - SIM Manager - SIM1 SIM2 - Click the SIM card icon - slide to turn on (the operation mode may be slightly different for different models of mobile phones).

3.If there is still no signal, it is recommended to turn off the SIM card and remove it, wipe the SIM card chip with an eraser, and then reinstall it.

4.If it doesn't work, try to change to another location to rule out whether it is caused by poor signal coverage in your location.

5.Try to change the network mode to 3G or 2G (do not select the auto-connect mode). Note: Some machines do not support changing the network mode.

6.Try to change another SIM card.

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The SIM card of the mobile phone is in poor contact with the shrapnel of the mobile phone card slot, resulting in the failure of the SIM card circuit, and the mobile phone cannot communicate with the network base station.

If the mobile phone card has no service, it may be that the signal is not good in the place, you can try to change the place to see if there is a signal, or it may be that the signal module is broken, which generally does not appear.

There is no service for the SIM card. 1.It is rare that there is no mobile signal in the environment, and it is rare that there will be a possible dead end of the mobile signal in the mountains or in the underground layer.

2.If the contact between the mobile phone card and the card slot is poor, you can turn off the mobile phone card, remove the mobile phone card, wipe the side that is in contact with the metal sheet with a paper towel, and then put the mobile phone back on. 3.

If the mobile phone card is damaged, you can replace the card with another normal mobile phone to try it, if it is really broken, you can go to the operator's business hall with your ID card to replace the mobile phone card for free.

When you hit **, the mobile phone card will become no service. This time, I will introduce to you how to fix the mobile phone card without service, come and take a look.

1. First turn on your phone, and in the settings page, click [Wireless & Network] to enter the corresponding interface.

2. In the [Wireless & Network] interface, check whether the airplane mode is turned off, and if it is on, turn off this switch.

4. The mobile phone has no signal may be due to poor SIM card contact, at this time, you need to take out the mobile phone SIM card, clean it and reinstall it, which can also solve the problem that the mobile phone has no signal.