The phone has been without a signal, the phone has been without a signal

Hello: According to your description, it is recommended that you try it by following the steps below:

1. Restart the phone (so that the phone can be searched and registered again) 2. Wipe the contact point between the mobile phone card and the mobile phone (whether the SIM card is in poor contact) 3. Change a SIM card to try (whether the SIM card is aged or damaged) 4. Back up the mobile phone data (** book, SMS information, multi** data, etc.) and restore the mobile phone factory settings (rule out whether the fault caused by the software).

If the problem persists, there may be a system or hardware problem, and we recommend that you contact a Samsung service center for testing.

1. Check whether the mobile phone card is inserted.

2. Check whether the mobile phone network standard is correct with the mobile phone card.

3. Check to see if there is a signal from other mobile phones around, and it is also possible that the signal is not good in remote places.

4. The mobile phone may be broken and sent for repair.

The reasons why the mobile phone has no signal are: network problems or network inaccessibility, and problems with the mobile phone itself.

1. Network problems or network inability to cover.

When the network coverage is not good, it is generally located in mountainous areas, basements, elevators, and when there is shielding or signal interference, there will be no signal or very weak. In the process of debugging, optimization and maintenance, the network may also cause signal instability, and the general network will return to normal, and the mobile phone signal will return to normal.

2. Problems with the mobile phone itself.

There may be problems with the mobile phone's receiving orange wide spike device and SIM card slot. You need to go to the repair point to have a look.

Of course, the factor of SIM card corruption cannot be ruled out.

Ways to tell if your phone has no signal:

1. Check whether the mobile phone card slot or SIM card is damaged.

You can insert other mobile phone cards to try, and then put the SIM card of the mobile phone itself on other mobile phones to see if there is a signal, if the card slot is damaged, it is recommended to replace the card Qiaoqiao slot, if the SIM card is damaged, please go to the business hall to replace the SIM card.

2. There is no signal on the mobile phone caused by network delay.

You can turn on your phone's airplane mode and turn it off after five seconds, or restart your phone.

3. If the signal in the place is not good, the signal cannot be found, so you can search in another place.

4. The receiver of the mobile phone is damaged.

If there is still no signal despite the above reasons, and you suspect that the mobile phone receiver is broken, please go to the after-sales location of the mobile phone for testing and repair.

5. When there is no signal when the mobile phone and SIM card are not damaged, it may be a problem with the mobile base station or the mobile phone system. <>

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. <>

The signal display of the SIM card is strongly related to the network environment, if you are using a Huawei mobile phone, the " " symbol sometimes appears on the signal grid of the status bar of the mobile phone, it is recommended that you take the following methods to try to solve the problem: Which Li.

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 and hidden capabilities, 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 reset the APN

Open Settings, enter APN in the search bar at the top, click APN Name to jump to the mobile data settings interface, click APN Name (APN) again, then tap Three or Four Dots in the upper right corner, and select Reset to Default Settings Attempt.

3) 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.

Make an appointment for service. Boarding service.

Repair spare parts** inquiry.

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 several reasons for this:

1. Operator limited. For example, the mobile phone is a mobile card slot and a China Unicom card slot, when both cards are mobile cards, the cards in the China Unicom card slot cannot be recognized and used.

2. The card slot is broken. The detection method is to swap the two cards to see if one is still out of service. If the card that was able to be used normally before is replaced with a card slot and there is no service, then it proves that the card slot is a problem.

3. The problem with the card itself. If there is a problem with the chip itself, it will also lead to unrecognition and service. The detection method is the same as above.

Reasons for not having a signal:

1. Whether the use of people around you is normal, if it is not normal, it is a network problem.

2. If other people are normal, do the operation of changing the phone and card, and confirm whether the mobile phone problem is still the SIM card problem. SIM problems go to the nearest business hall for detection, mobile phone problems, restore the factory after backing up the data, if the problem still exists after restoration, go to the nearest mobile phone after-sales testing.

3. There is no mobile signal coverage in the area, so no signal will also be displayed.