The phone has no signal in one place and can in other places

1. There is no signal or the signal is relatively poor, mainly because the signal will be affected by various factors such as terrain, landform, and high-rise buildings in the process of propagation, such as the current location is in a relatively closed place, and the signal may be affected.

2. If the mobile phone signal of other China Unicom users is normal, the following methods can be used to troubleshoot:

Method 1] Turn on airplane mode, then turn off or restart your phone and try again.

Method 2] Swap phone and card test, that is, change the mobile phone card to the mobile phone of a family member or friend and try again.

Feedback, we will check and deal with it as soon as possible.

If there is no signal on your phone or an emergency call prompt is displayed on the screen, it is recommended:

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 open (the operation mode may be slightly different for different models).

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.

7.Update your phone's system version: Settings - About Phone (About Device) - Manual Update Automatic Update (Software Update System Update - Update). Note: Please back up the data (contacts, messages, **, etc.) in your device before upgrading.

If there is still no signal or emergency call is displayed after the above operations, please bring the purchase invoice, warranty card and machine to the nearest service center for inspection.

1. Please avoid using magnetic metal protective case, magnetic bracket or magnetic chuck If your mobile phone uses a metal protective case, magnetic protective case, magnetic bracket or magnetic chuck, it is recommended that you try to remove it, metal and magnetic materials are easy to interfere with the signal, resulting in poor mobile phone signal.

2. Please confirm whether to disable the SIM card, please search for and enter the SIM card management in Settings, and make sure the SIM card switch is turned on. Disabled SIM card will cause the signal bar to show no signal (when a single SIM is inserted) or only one card signal (when dual SIM is inserted).

3. Please troubleshoot the mobile phone card.

It is recommended that you install the SIM card of the same operator into your mobile phone to check, if the signal display 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 the new mobile phone card.

1) If your mobile phone card is manually cut card, it may affect the signal reading 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) Dirty or oxidized SIM cards will also affect the reading of signals, so it is recommended that you keep the SIM card clean.

4. Please rule out network reasons.

1. Try changing your current location.

In some more enclosed indoor environments, such as houses with dense spacing between buildings, the mobile phone signal may be blocked, resulting in poor signal.

Carriers' network coverage varies depending on the region, and some areas may have insufficient coverage capacity, resulting in poor mobile phone signals.

If your mobile phone has a poor signal in a specific area, or if a nearby friend's mobile phone using the same carrier** card also has a poor signal, it may be caused by the poor network quality in your location, and you can return to normal after changing to another place.

2) Please try resetting the APN

3) Please try to reset the network settings.

4) Please restart your phone or switch on airplane mode to try.

5. Please try after updating your phone system to the latest version.

It is recommended that you update the system version of your mobile phone in a timely manner.

Still can't be solved.

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 (QQ, WeChat and other third-party apps need to be backed up separately), bring the relevant purchase voucher, and go to a Huawei customer service center near you.

Category: Electronic Digital >> Other Digital Products.

Analysis: Poor signal is usually caused by network reasons, which may also lead to problems such as SMS delays. There are generally several reasons why a call may be interrupted due to network issues.

First of all, the mobile phone is in the signal blind zone, which will cause the phenomenon of "not in the service area" or call interruption, which includes outside the network coverage area, such as suburbs and rural areas where network communication facilities have not yet been built, and in the city where the mobile phone is blocked by shielding and the signal is not covered, such as in the elevator, underground places, buildings, etc.

Secondly, it is the phenomenon of bad signal due to interference. Since the mobile phone receives signals through the propagation of electromagnetic waves, the base station establishes a connection between the transmitted radio waves and the mobile phone, so as to achieve the purpose of voice call. Therefore, the interference of electromagnetic waves can have a negative effect on mobile phones.

When the interference of certain electromagnetic waves in the air exceeds a certain level, and the signal-to-noise ratio of the mobile phone is reduced below the standard value, the mobile phone will have no signal or drop out. Therefore, it is best for consumers to stay away from devices that can emit powerful electromagnetic waves and go to places with little interference to talk.

Again, the disconnection is caused by the failure of the cross-zone switch. Network operators serve users by transmitting wireless signals from base stations, and the range of base stations is limited, so there may be many base stations in an area. All the base stations are combined into a network system, each base station has its own range, beyond this range, the mobile phone has to replace the base station, so as to keep the mobile phone always in the network.

When a user surpasses a service cell to another service cell during a call, the user's voice channel also needs to be switched from the original service cell, but if the new service cell is busy at this time, and there is no extra channel allocated to the user, the handover of the service cell will fail, so the user's call process will also be interrupted. Adding base stations can alleviate this situation appropriately, but at the same time, it will also increase costs, and too many base stations will also increase radiation and pollute the environment. Therefore, how to not increase the number of base stations, but also make it not easy to drop the line when switching across the area, is a problem that network operators focus on solving.

In addition, due to temporary network failures, or the network is particularly busy, it will also cause poor mobile phone reception. For example, in the bustling business district, there may also be a situation where the ** cannot be dialed out or called.

In addition to the poor signal caused by the network, it is also a problem with the user's mobile phone. The SIM card contacts of the mobile phone are dirty, which will also cause the reception and transmission signal to be poor, so just take out the card and wipe it clean. There are also mobile phone users who have taken some "special measures" - when the mobile phone is turned on, the battery will be unplugged, and there will be a "not in the service area" response effect, it is reported that some people are currently using this method to evade the connection.

However, the staff of the repair center advises everyone that using this method often will shorten the life of the SIM card and eventually cause damage to the phone.

Summary. Clause.

1. It is related to the mobile phone card, and the signal strength of the three operators in the same area, China Mobile, China Unicom, and China Telecom is different. Clause.

Second, if the mobile phone card is from the same operator, it may also have something to do with whether your mobile phone supports the signal frequency band, and some mobile phones do not support 5G

What is the reason why I don't have a mobile phone signal in the same area?

Clause. 1. It is related to the mobile phone card, and the signal strength of the three operators in the same area, China Mobile, China Unicom, and China Telecom is different. Clause.

Second, if the mobile phone card is from the same operator, it may also have something to do with whether your mobile phone supports the signal frequency band, and some mobile phones do not support 5G

It's all 4G phones, everyone else has a signal and mine doesn't have any signal at all.

Someone else sends mine**always shows shutdown.,I can't hit someone else's**.。

Do I still need to pay for it?

There are several reasons for this: the phone is not the same, the phone has been repaired, and the signal problem is caused by the carrier.

There's also the issue of base stations.

Not repaired. For example, in some places, China Mobile Unicom has no signal, and China Telecom has it, and this is the base station problem.

There has been no such problem before, only in the last month or two.

As soon as I arrived at the store, there was no mobile signal.

That could be a cell phone reception problem.

This may have to be asked after sale.

I have also experienced this problem of yours, but it is the mobile phone that has been repaired, resulting in poor signal reception, and it is too troublesome to go to the after-sales service, and I have to repair it, I directly ran a telecom.

The mobile phone has a signal indoors, but there is no signal outdoors, which may be caused by the following reasons:1Signal coverage silver lift problem.

If your phone is using a 2G 3G network, you may experience poor signal coverage when you are outdoors. At this point, you can try to switch to a 4G network, as the 4G network has a wider signal coverage and can provide better signal service. 2.

buildings and natural environmental impacts. Environments such as tall buildings, valleys, and forests can have an impact on mobile phone signals and hinder signal transmission. At this point, you can try to go to an open area, or use a device such as a signal booster to boost the signal.

3.Problems with your phone's hardware. If your phone has no signal indoors and outdoors, then there may be a problem with the phone's hardware, and it is recommended that you try to replace your phone or contact the manufacturer's after-sales service for repair.

4.Carrier signal issues. The signal of the operator varies greatly from one region to another, which may affect the signal quality.

At this time, you can try to change the Gaoyou SIM card of another operator, or contact the operator's customer service for a solution.

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) 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.

Huawei Customer Service Center.

Make an appointment for service. Repair spare parts** inquiry.

Summary. Hello dear, I am happy to answer for you, for you to find a SIM card with a signal, another SIM card has no signal possible reasons are as follows: First, there is no signal that the SIM card is not properly placed in the card slot, if it is, you can reinsert the SIM card once.

Second, if there is no signal, the SIM card is damaged, check whether the golden card area of the SIM card is obviously damaged or scratched. If so, it can only be replaced. Third, there is no signal that the SIM card is not in good contact, the SIM has been used for a long time or the SIM card is often plugged and unplugged, which will cause poor contact between the card and the mobile phone, at this time, you need to check the electrodes of the SIM and **, if it is not clean, you can use an anti-static cloth to clean it.

Fourth, the mobile phone problem, the mobile phone used is only a dual-open mobile phone instead of a dual-open dual-standby mobile phone, this kind of mobile phone can only choose a SIM standby, and the other SIM card is naturally out of signal, in this case, only to replace a dual-open and double-standby mobile phone. 5. Both SIM cards are telecom cards, and a mobile phone cannot use two telecom cards at the same time, so the only way to do this is to replace one of the telecom cards with the cards of other operators.

Hello dear, I am happy to answer for you, for you to find a SIM card with a signal, another SIM card has no signal possible reasons are as follows: First, there is no signal that the SIM card is not properly placed in the card slot, if it is, you can reinsert the SIM card once. Second, if there is no signal, the SIM card is damaged, check whether the golden card area of the SIM card is obviously damaged or scratched.

If so, it can only be replaced. Third, there is no signal that the SIM card is not in good contact, the SIM has been used for a long time or the SIM card is often plugged and inserted, which will cause poor contact between the card and the mobile phone, at this time, you need to check the electrodes of the SIM and **, if the macro is not clean, you can use an anti-static cloth to clean it. Fourth, the problem of mobile phones, the use of the mobile phone is only a double-open mobile phone instead of a dual-open and double-standby mobile phone, this kind of mobile phone can only choose a SIM standby, and the other SIM card naturally has no signal to close the mind, in this case only to replace a double-open and double-standby mobile phone.

5. Both SIM cards are telecom cards, and a mobile phone cannot use two telecom cards at the same time, so the only way to do this is to replace one of the telecom cards with the cards of other operators.

In this case, it may be that the pulling force of the mobile phone card is not the same as that of other mobile phones, resulting in the mobile phone stuck in a lead object that is not strong enough, so there is no signal on other mobile phones. In addition, it is also possible that the location of other mobile phones is far away from the base station, so the signal cannot be pulled.