What is the reason why the phone shows no signal

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 or the emergency call prompt is displayed on the screen, it may be that the environment is not covered by the network, or the mobile phone card is damaged, it is recommended to follow the steps below:

4.If the location is a dead zone, please try to change to another location to rule out whether it is caused by poor signal coverage at the location.

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 signal coverage in the area, so no signal will also be displayed.

The above information is for reference only, Guangxi Telecom worry-free card, monthly rent is only five yuan, traffic ladder billing, the more you use, the cheaper, the more you can log in to the Guangxi Telecom online business hall for inquiries, customer service No. 127 for your answer.

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. Mobile phone SIM card.

Poor contact with the shrapnel of the mobile phone card slot, resulting in the SIM card circuit can not work, and the mobile phone and the network base station can not communicate, at this time, you can remove the SIM card and wipe the SIM card gold finger with a cleaning cotton cloth.

After that, Bituan reinstalled.

2. The application software for the installation of the mobile phone is not compatible with the system, resulting in the system software turning off the modem in the mobile phone signal processing circuit.

At this time, you can turn off the phone and restart it, the modem in the mobile phone signal circuit will restart, and when 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 the network signal coverage area has no signal, it fails to reconnect to the search 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 of the bank 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 sock mobile phone card to the mobile phone of a family member or friend and try again;

3. Check to see if there is a signal from other Unicom users around.

There are only two situations when the phone has no signal:

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 appearance. 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 a problem with your phone's receiver. You need to go to the repair point to have a look.

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

What is the reason why there is no signal on the mobile phone?

There are only two situations when the phone has no signal:

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 appearance. 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 a problem with the receiver and SIM card slot of the phone. You need to go to the repair point to have a look.

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

What is the reason why there is no signal on the mobile phone?

Judgment method. 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 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 the airplane mode of the mobile phone, turn it off after five seconds, or restart the mobile phone.

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

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

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.

No, I changed a few cards.

Also, see if the mobile data switch is not turned on.

Ask this all open 3

The card does not show 4G

There is no signal on the phone:

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

2. Degaussing of mobile phone card; (Replaceable mobile phone for checking).

3. Caused by loose mobile phone card slots. (Replaceable mobile phone for checking).

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.)

The above information is for reference only, Guangxi Telecom worry-free card, monthly rent is only five yuan, traffic ladder billing, the more you use, the cheaper, the more you can log in to the Guangxi Telecom online business hall for inquiries, customer service No. 127 for your answer.

No, I changed a few cards.

Also, see if the mobile data switch is not turned on.

Ask this all open 3

The card does not show 4G

There is no signal on the phone:Eliminate it in a few simple steps and fix it perfectly.