The mobile phone is often out of service and needs to be shut down and restarted, what is the reason

There are three reasons for this.

On the one hand, because of the SIM card of the mobile phone, this can be excluded by changing another mobile phone, if it is the reason for the SIM card, it is recommended to bring the ID card to the business hall to change a new SIM card.

On the other hand, the reason is the problem of the mobile phone, you can try to plug in another SIM card to see if it can be used normally, if not, then it may be a problem with the mobile phone system or hardware. For example, a third-party system package has been swiped.

The last reason may be because the signal in the area where the landlord is located is not good, and the mobile phone of the landlord's brand has a weak ability to receive the signal, so there will be no service often, but if it is a similar mobile phone, this will not happen, then it is the reason above.

You need to shut down and restart, and the solutions are as follows:

The reason for the bad signal in the area can be changed to another place.

The SIM card of the mobile phone is damaged, and this can be ruled out by replacing it with another phone.

If it is the reason for the SIM card, it is recommended to bring the ID card to the business hall to change the SIM card.

If it doesn't work, then there may be a problem with the system or hardware of the phone, and you need to flash the phone or restore the factory settings.

Mobile phone is mobile, or wireless, commonly known as mobile phone, originally just a communication tool, in the early days there was a common name of big brother, is a portable terminal that can be used in a wide range, was first developed by the United States Bell Labs in 1940 made a field mobile machine.

The phone "no service" is not available, you can detect it in the following ways:

1.Please make sure your phone is not set to airplane mode;

2.Please confirm whether your mobile phone is in arrears;

3.You can go to a place with a better signal and turn it back on;

4.You can change the card on the mobile phone to try, or put the card on another mobile phone to try, if it can be used normally, it is recommended that you go to the business hall to test, if it still does not work, it may be caused by the mobile phone system, you can go to the mobile phone repair point to test the mobile phone.

Summary. Dear, hello, why do you consult why my mobile phone sometimes always shows no service, but once restarted, the answer is as follows: 1. The SIM card of the mobile phone is in poor contact with the shrapnel of the mobile phone card slot, resulting in the SIM card circuit cannot work, and the mobile phone can not 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 covered, you can change the location to an open area, and then check the mobile phone signal grid display, such as the display after changing the location.

Why does my phone sometimes always show no service, but once it restarts, it is fine.

Dear, hello, why do you consult why my mobile phone sometimes always shows no service, but once restarted, the answer is as follows: 1. The SIM card of the mobile phone is in poor contact with the shrapnel of the mobile phone card slot, resulting in the SIM card circuit cannot work, and the mobile phone can not 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 covered, you can change the location to an open area, and then check the mobile phone signal grid display, such as the display after changing the location.

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.

Dear, it is recommended to reissue, my mobile phone has also appeared like this before, and there will be no <> after reissue

1.Make sure you are in a good network environment.

Try changing your current location.

1) In some more closed indoor environments, such as houses with dense spacing between buildings, the mobile phone signal may be blocked, resulting in no service.

2) The degree of network coverage of operators varies according to different regions, and some areas may have insufficient coverage capacity, resulting in no service for mobile phones.

If your phone is not available in a specific area, or if a nearby friend's phone with the same carrier** card is also not serviced, it may be caused by poor network quality in your location, and it can be restored to normal after changing to another location.

2.Please turn on and off the airplane mode.

Special configurations of some networks may cause your phone to be unserviced, which can be restored after switching off airplane mode.

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 service for the mobile phone.

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 or four dots in the upper right corner, and select Reset to Default Settings to try.

5.Please reset your network settings.

6.Please update your phone system to the latest version.

If your phone is still out of service, contact Huawei Consumer Service** (950800) for more 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.

Boarding service. Make an appointment for service.

Repair spare parts** inquiry.

If your mobile phone cannot access the Internet normally, please check the following conditions:

1. After 3-5 minutes of power off, restart the phone and try again;

2. Confirm whether there is a network, it is recommended that you can use it in a place with a strong signal;

3. Check whether there is still a phone bill, if the balance is insufficient, you need to recharge before you can use it;

4. Check whether the USIM card is inserted, if it has been inserted but still cannot be used, it is recommended that you go to the business hall to check whether the USIM card is faulty, or replace the card for testing;

5. If the traffic usage reaches the maximum value in the current month, the network will be automatically closed, it is recommended that you pay attention to our SMS reminder or inquire about the **product description.

If your mobile phone cannot access the Internet normally, please check the following conditions:

1. After 3-5 minutes of power off, restart the phone and try again;

2. Confirm whether there is a network, it is recommended that you can use it in a place with a strong signal;

3. Check whether there is still a phone bill, if the balance is insufficient, you need to recharge before you can use it;

4. Check whether the USIM card is inserted, if it has been inserted but still cannot be used, it is recommended that you go to the business hall to check whether the USIM card is faulty, or replace the card for testing;

5. If the monthly traffic reaches the maximum value, the network will be automatically closed, and it is recommended that you leave a text message reminder or inquire about the **product description.

Displays the possible causes of "no service" and how to solve them

1.In airplane mode, turn it off. or the signal is weak, consult the operator.

2.Not recognized (such as mobile phone using telecom SIM card)3Check whether the card slot has loose and deformed contact defects, and send it for repair.

4.Restart the phone (if the battery is removable, it is best to remove the battery and restart) and put the card on another phone to test whether the SIM card is faulty.

6.Software or system reasons. To flash the machine, it is better to use the official rom7If the hardware of the mobile phone fails, send it for repair.

The phone is always without service, learn the solution, and never be afraid again.

Flash or factory reset to give it a try.

Summary. Hello, there are two situations where there is no service after the mobile phone is turned off every time, the following is the first one, the SIM is abnormal, please confirm whether there are any of the following situations: First, please confirm whether the SIM card type is correct according to the mobile phone model.

An incorrect SIM card can damage the card tray and card slot or even fail to be removed;

2. Please make sure to use a standard SIM card. Do not use a non-standard SIM card or cut the card by yourself, cutting the card can easily cause the SIM card to be unable to recognize or damage the mobile phone, it is recommended to go to the business hall to change the original standard SIM card;

3. Please confirm whether the card is placed correctly. Whether the notch of the SIM card corresponds to the card slot;

4. Please confirm whether the surface of the SIM card is dirty. If the SIM card has been used for a long time, you can wipe the surface of the chip with alcohol, or go to the business office to replace the original standard SIM card. If the SIM card is used for a long time, the metal surface is easy to be oxidized, which is easy to cause probabilistic card recognition;

5. Do not plug or unplug the SIM card when the device is turned on. After inserting the SIM card, please restart your phone and try;

6. If the problem still exists, please back up the data in advance and bring the purchase invoice to the after-sales service point for maintenance.

Every time the phone is turned off, there is no service.

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Hello, there are two situations where there is no service after the mobile phone is turned off every time, the following is the first one, the SIM is abnormal, please confirm whether there are any of the following situations: First, please confirm whether the SIM card type is correct according to the mobile phone model. An incorrect SIM card can damage the card tray and card slot or even fail to be removed; 2. Please make sure to use a standard SIM card.

Do not use a non-standard SIM card or cut the card by yourself, cutting the card can easily cause the SIM card to be unable to recognize or damage the mobile phone, it is recommended to go to the business hall to change the original standard SIM card; 3. Please confirm whether the card is placed correctly. Whether the notch of the SIM card corresponds to the card slot; 4. Please confirm whether the surface of the SIM card is dirty. If the SIM card has been used for a long time, you can wipe the surface of the chip with alcohol, or go to the business office to replace the original standard SIM card.

If the SIM card is used for a long time, the metal surface is easy to be oxidized, which is easy to cause the probability of starting the lease and not knowing the card; 5. Do not plug or unplug the SIM card when the device is turned on. After inserting the SIM card, restart the phone and try it; 6. If the problem still exists, please back up the data in advance, and bring the purchase invoice to the after-sales service point for maintenance.

The second situation is that there are some applications in your system that interfere with the normal operation of the system, especially some programs that have obtained root privileges, so for the sake of the system security of your phone, please do not use root privileges at will. You can back up your data, enter Recovery to clear the data you have (shut down, press and hold the volume up + open field bucket grip key to enter recovery), upgrade your phone to the latest development version of the system, don't install apps that require root rights for the time being, and see if it can be restored to normal.