What s the deal with the phone card showing no service?

First of all, you can enter the settings page of your phone, find "Airplane Mode" on the page, and <

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Tap to turn on the airplane mode of the phone, then the phone will enter the airplane mode, in the airplane mode, the phone has no signal.

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It is possible that the mobile phone has no signal because of the poor contact of the SIM card, which is why we need to take out the SIM card of the mobile phone, clean it and reinstall it, which can also solve the problem of no signal on the mobile phone.

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Click to enter the backup and reset page, and you can see "Reset all settings" on the page, <

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Tap "Reset All Settings" to reset all settings of your phone and see if your phone has a signal.

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You can also click "Erase All Data" to erase all data in your phone's system space, restore it to factory settings, and see if your phone has a signal. If none of the above methods work, it is possible that there is a hardware defect or a bug in the system.

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Of course, you have to make sure that your mobile phone card is not in arrears, in normal use, to detect whether the mobile phone SIM card is damaged, you can install the SIM card into other mobile phones, see if there is a signal, if there is no signal, it may be that the SIM card is damaged, you can go to the operator's business hall to replace the SIM card.

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.

1. Check the operator**.

Please check the status of your SIM card** and make sure that the SIM card is not in arrears or cancelled.

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

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.

If you are in a closed indoor environment (such as a basement, elevator, etc.), the mobile phone signal may be blocked, resulting in no signal, and you can go to an 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. 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 into other mobile phones that support this card for comparison test, if there is no signal, it is recommended that you consult the operator for processing.

5. Confirm whether the mobile phone supports the corresponding operator's mobile phone card;

6. Reset network settings.

Go to Settings - System Management - Backup & Reset - Reset Network Settings - Select the corresponding SIM card - Reset Settings, and then use 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 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 reception before going over, so as to avoid delaying precious time and running in vain.

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.

Metals and magnetic materials can easily interfere with the signal, resulting in no signal on the 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 closed indoor environments, such as houses with dense spacing between buildings, the mobile phone signal may be blocked, resulting in poor signal. 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 signal on mobile phones.

You can determine whether the current regional network coverage is poor by whether the mobile phone has no signal when it is only in the same area, or whether there is no signal from nearby mobile phones using the same carrier** card.

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 dots button in the upper right corner;

e.Click Reset to default.

Method 2: If your phone is an EMUI and above or Magic UI 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 dots 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.

It's very simple, this is because the mobile phone has no signal, or the mobile phone's flight mode is turned on, and there are many reasons for the former, such as entering the elevator and half of the service is not served, and it is normal to change places.

1. There is no signal coverage in the area, or there is interference with interference;

2. The SIM card chip of the mobile phone is damaged, resulting in the SIM card slot not being able to recognize the SIM card chip. It is recommended to go to the business hall to change the SIM card;

3. If the mobile phone card slot is damaged, it is recommended to go to vivo after-sales service for inspection and maintenance;

4. Caused by the mobile phone system, the system ROM package may not be supported after flashing, it is recommended to change to the original system version;

5. The network standard supported by the mobile phone does not match the mobile phone card, for example, the mobile phone of China Unicom does not support the service of the telecom card.

In addition, the first way you do this is to go somewhere else, turn off your phone and turn it on again.

Solution: You need to change the location and try again.

2. The mobile phone does not support the mobile phone card of this operator, for example, the mobile phone only supports the card of telecommunications, and the mobile card is inserted, then the mobile phone will show no service.

Solution: You need to change the SIM card.

3. The phone is set to airplane mode, and in airplane mode, the phone will show no service.

Solution: Turn off the airplane mode of your phone.

4. If the mobile phone is in arrears, the operator will turn off the service function of the mobile phone after the mobile phone is in arrears, and the mobile phone will be displayed as having no service at this time.

Solution: You need to pay off the overdue bill and top up a new credit credit.