How to deal with the phenomenon that there is no signal on the mobile phone?

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

1.Whether a magnetic case, metal case, magnetic stand, or magnetic chuck cup is used.

If your phone uses a metal case, magnetic case, magnetic bracket or magnetic chuck, it is recommended to 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 spacing between buildings, the mobile phone signal may be blocked, resulting in poor signal. You can go outside to test if the mobile phone signal can return 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 that 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 top right corner and tap Reset to default.

4.Clean the SIM card, cross-swap card attempt.

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

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

5.Reset network settings.

If the problem persists, we recommend going to Settings, searching for Restore Network Settings, and clicking Reset Network Settings. This operation will delete Wi-Fi and Bluetooth related records, so please operate with caution.

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

If there is no signal on the mobile phone, please carry out the following pretreatment: 1. Dial out the UIM card and re-install it for testing; 2. Considering the failure of the mobile phone terminal, it is recommended to do a test of changing the phone and replacing the card or go to the after-sales testing terminal; 3. It is recommended to check whether the mobile phone is set to airplane mode when using a smartphone. 4. Find out if the surrounding C network users have signals and troubleshoot the base station.

The solution to the phone no signal.

If you use a vivo mobile phone, the signal status of the mobile phone card is mainly related to the network environment, if your mobile phone has no signal, please follow the steps and methods to judge the problem:

1. Check the operator**.

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

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

Please check whether you use metal protective shells, magnetic protective cases, 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. Check your phone settings.

Check airplane mode: Check whether there is an "Airplane" icon in the status bar of your phone, and 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 you have installed dual SIM cards on your mobile phone 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.

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. Reset all settings (do this when you can't see the reset network settings menu).

Go to Settings - System Administration - Backup & Reset - Restore all settings and follow the on-screen prompts.

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 your data, it is recommended that you back up your phone data in advance before the operation.

8. Service center testing.

If the above methods cannot be solved, please back up your mobile phone data in advance, and bring your mobile phone and purchase voucher to the vivo customer service center for testing.

Customer service center address: Enter the vivo official website vivo**app--my-service outlets or vivo official website web version--bottom of the bottom--service support--service network inquiry--select the province and city to query the customer service center address. It is recommended to contact ** in advance before going to avoid empty running, plan the itinerary reasonably, and travel safely.

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 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.

If you are using a Huawei phone, and the " " symbol sometimes 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 check the SIM card.

1) Dirty or oxidized SIM cards can also lead to poor contact, so it is recommended that you keep the SIM card clean.

2) If your mobile phone card is a manually cut card, 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 office to apply for a standard mobile phone card.

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

Please search for and go to SIM card management in Settings, and make sure that the SIM card switch is turned on. Disabled SIM card will cause the signal bar to show no signal, or only one card signal.

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 rule out network causes.

1) 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.

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

In some more enclosed indoor environments, such as houses with dense spacing between buildings, the cell phone signal may be blocked, resulting in no signal.

The degree of network coverage of carriers 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 reset the network settings.

4) 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 Dots or Four Dots in the upper right corner, and select Reset to Default Settings to try.

5.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.

Huawei Repair Parts** Query.

Make an appointment for service. Boarding service.

Here are the steps to set it up.

1.First of all, the notification bar on your phone shows a carrier "no service" signal.

2.Then turn on your phone screen to find the settings icon and tap on it.

3.Open your phone's settings to find the Wireless & Networks option and tap on it.

4.Switch to the Wireless & Web interface options and click on the Dual SIM Management option.

5.Under the dual SIM management interface, if the phone is inserted into the card slot correctly, it will appear gray, but it is not already open, and it is already closed.

6.Click the switch button to turn it on, and the name of the operator will be automatically displayed in the notification bar.

What should I do if the mobile phone suddenly has no signal, the mobile phone store owner will teach you the solution, remember to collect it after reading.

Try switching the airplane mode and turning it off after four or five seconds; Or avoid bustling business districts, rush hour, bad weather, and electromagnetic interference zones; It is best not to use a metal phone case.

This situation is usually caused by a problem with the reception of the mobile phone signal, and I will share some ways to deal with it for you below.

First of all, check if the signal bar of your phone is displayed normally. If it's not normal, you can try turning off and re-turning airplane mode on, or restart your phone to try to fix the problem. If the signal is still not restored, you can try to update the phone's network settings or update the phone's system software, which may fix the software problem.

If none of these methods solve the problem, then there may be a problem with the phone's hardware and you may need to go to a repair center for service. While waiting for repairs, you can try to use a different phone or ** to communicate so as not to miss important ** or information.

Finally, I would like to remind everyone that when using a mobile phone, you should pay attention to avoid receiving items that interfere with the signal, such as metal, glass, etc., which may affect the signal reception and cause the signal to be unstable.

In short, when you encounter no signal on your mobile phone, you can try some basic solutions, and if you can't solve it, you can seek help from professionals. Hopefully, these methods will be helpful to everyone.