The phone has been without signal, what s going on

First, environmental problems, such as buildings in the city are relatively high, if you live in a lower position, there will be no signal, such as the same in rural areas, what to do, how to solve similar problems, this is to find mobile or Unicom to install a signal receiver to strengthen the signal, second, whether there is a signal jammer around you, the mobile phone receives the signal through the propagation of electromagnetic waves, if there is interference with electromagnetic wave equipment just turn off.

Third, the peak time zone of the network will also make the signal worse, because there are so many mobile phone users now, and it will definitely be more congested when it appears at the peak, which depends on whose environment and the signal reception ability of the mobile phone itself is good, and whether it can grab someone else's. This problem can be solved by simply selecting the time zone.

Fourth, if your mobile phone battery is not good and the voltage is unstable, the biggest problem with this smartphone is the battery, so a bad battery will also make the mobile phone signal worse, because the unstable voltage will cause insufficient power supply to the circuit receiving the signal. This problem is only as long as the battery has been replaced.

Fifth, the loss of the baseband serial number, that is, the "radio" in the mobile phone, radio is responsible for the communication function of PPC as a mobile phone function, once the software application layer is lost or the data is destroyed, it will not be able to connect to the network and make calls**. Therefore, this problem needs to be re-flashed into the ROM of the corresponding model, and you can also enter the radio of the model separately

The solution to the phone no signal.

Mobile phones often have no signal because of poor signal coverage, mobile phone problems, carrier failures, SIM card failures.

1. Poor signal coverage.

If you are in an area with poor signal coverage, or in an area with poor signal such as deep in a building or basement, it may cause a mobile phone to have no signal or a very weak signal.

2. Mobile phone problems.

If there is a problem with the mobile phone itself, such as a damaged antenna or software failure, it will also cause the mobile phone to have no signal or poor signal.

3. Operator failure.

If there is a problem such as carrier base station failure and network congestion in your area, it may cause the mobile phone to fail to receive the signal.

4. SIM card failure.

If the SIM card fails, such as damaged, expired, etc., it will also cause the mobile phone to have no signal or poor signal.

Ways to fix the problem of no signal on your phone:

1. Use your mobile phone in an open area or a place with good signal coverage.

2. Check whether the phone has hardware or software failures, such as checking whether the antenna is damaged, restarting the phone, etc.

3. Check whether the local operator has problems such as base station failure.

4. Change the SIM card. <>

1.Please check 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.

2.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.

3.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.

4.Please rule out network causes.

1) Make sure you are in a good 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.

2) Please restart your phone or switch on 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.

3) 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.

4) Please reset the network settings.

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.

Repair spare parts** inquiry.

Make an appointment for service. Boarding service.

Operating the phone: Xiaomi Mi 8

Operating system: The steps to change the situation if the mobile phone has no signal are as follows:

1. Go to the desktop of the phone to find the settings, and click Settings.

3. In the interface, find the option of airplane mode and click to turn it on.

4. After turning it on, turn off the option of airplane mode again.

5. If the above steps still don't work, then you can turn off, turn on or restart the phone.

Reasons why there is no network signal on the mobile phone:

1. The distance between the wireless network card and the wireless IP or wireless router is too far, which exceeds the coverage of the wireless network, and the wireless signal is very weak when it reaches the wireless network card, so that the wireless client cannot connect normally.

2. The wireless IP or wireless router is not powered on or does not work properly, resulting in the wireless client being unable to connect at all.

3. When the wireless client is far away from the wireless IP, the directional antenna technology is often used to enhance the propagation of the non-nuclear bending signal, and if there is a problem with the angle of the directional antenna, it will also cause the wireless client to be unable to connect normally.

4. If the wireless client does not set the network IP address correctly, it will not be able to communicate with the wireless IP.

5. For security reasons, the wireless IP or wireless router will filter some MAC addresses, if the MAC address of the network card is filtered out, then the normal network connection will not be possible. <>

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

Metals and magnetic materials can easily interfere with the signal, resulting in poor mobile phone signals.

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 poor mobile phone signal.

You can determine whether the poor mobile phone signal is caused by the current regional network coverage by whether the mobile phone signal is poor when you are only in the same area, or whether the mobile phone with the same carrier** card in the vicinity also has poor signal.

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.

If your phone has no signal, it's likely that you have accidentally turned on the airplane mode on your phone.

If the SIM card is not plugged in, there will also be a problem that the mobile phone shows no service. Check the SIM card and reorganize it.

If it shows no service, there may be a problem with the network system. Open Settings, click General, and scroll down to Restore to reset network settings. After the phone restarts, see if there is any signal.

When entering a confined space such as an elevator, there will also be no service. This can also happen when you go to a mountain or desert or other barren mountains. Leaving the area will return to normal.

First of all, it may be because of the mobile phone card, her contact is not particularly good, it is possible to restart the mobile phone, there is also a possibility that the mobile phone card is in arrears, and there will also be this situation.

It may be that the place is too remote, and the mobile phone signal is very poor in such a place, or there is a strong magnetic field here that interferes with the mobile phone signal.

Hello! Some are mobile phone problems, and there is also a problem with the mobile phone card, or the mobile phone has been used for a long time, the signal is not very good, and there is a problem with the mobile phone.

What happens if there is no signal on the phone? You really can't blame the operators for this.

The phone has no signal, what's going on? Maybe it's not on the net, okay, you can check it out.

Consult the mobile phone operator, and you will know what is going on with the phone has no signal.

There are several reasons why the cell phone has been out of signal for a limited time, being affected by the building, and the cell phone itself.

1. The mobile phone signal is limited by the coverage of the base station.

The coverage of the base station signal is limited, and if you are outside the signal coverage range, the mobile phone will have an unstable or even no signal. Especially in some remote areas or high-rise buildings, the signal coverage is more limited.

2. The mobile phone signal is affected by buildings, terrain and other factors.

Blocking of terrain such as buildings and hills can cause signal blocking, which is one of the reasons for the unstable mobile phone signal. Especially in some high-rise buildings, the signal will be blocked by buildings such as building walls, resulting in unstable mobile phone signals.

3. The mobile phone signal is affected by the device itself.

If the phone itself is faulty or damaged, it will also cause the signal to be unstable or no signal. In addition, the phone does not update the software in time or there are viruses and other problems can also affect the signal stability.

The mobile phone signal is sent by the mobile phone signal station, and when two people are talking, the mobile phone signal is transmitted through the mobile phone signal station and then through the relay station. In order to ensure the quality of the call and prevent the number channeling, the mobile phone signal will be accompanied by the mobile phone signal station and the mobile phone relay station**. The technology of the telecommunications company can find out the location of the caller based on these **.

One of the services in Beijing's Dynamic Zone is a "Dynamic Location" service, which uses this technology to return the current location of the mobile phone holder. <>

There could be a variety of reasons why your phone has no signal all the time. Here are some of the conditions that can cause your phone to have no signal:

1.Network coverage area problem: The mobile network signal cannot be searched on the mobile phone may be because the signal coverage in your area is not good, so it is recommended that you try to go to another place to test whether the mobile phone signal is working.

If the signal is still bad, it may be because the geographic location you are in has a small signal coverage.

4.Network failure: When there is no signal on your phone, it is also possible that there is a network failure in your area, and it is recommended that you try to contact the service provider to check the network status.

5.Other hardware issues: Other hardware issues such as damaged baseband chips and antenna problems can also cause the phone to have no signal.

If you're not sure what's causing the signal issue, you can contact your mobile phone service provider or brand customer service for help. <>

1. It may be that the mobile phone card is in arrears;

2. Degaussing of mobile phone card; (You can try it with a different phone).

3. Caused by loose mobile phone card slots. (You can change the mobile phone to try) 4. The current network signal is not good; (If the signal of your friends is not affected, it means that it is not the current network signal problem).

5. Mobile phone setting problems. (For example: airplane mode or turn off the card.) ）