The phone always shows no service what s going on with the M3

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.

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. The SIM card of the mobile phone is in poor contact with the shneme of the mobile phone card slot, resulting in the failure of the SIM card circuit and the inability of the mobile phone to 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 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.

If it doesn't work, the mobile phone card is broken and needs to be replaced, or there is a problem with the card slot.

The phone card slot may not be in good contact, or the phone itself is a problem, restart the phone to try.

If there is no signal on the phone or a no service or 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 turn on (the operation mode may be slightly different for different models of mobile phones).

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: The network mode is not supported for the sub-branch machine.

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 cracker to the service center for inspection.

The card is a problem or the card slot is broken.

Just change the network to 3G or 2G, and my Xiaomi Mi 2 will change to 2G with signal.

The signal display of the mobile phone card is strongly related to the network environment, if you are using a Huawei mobile phone.

When the status bar of your phone shows no service, we recommend that you try to resolve it by taking the following methods:

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 avoid exposure to metal or magnetic materials.

interference. 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.

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

4.Please restart your phone or switch on and off airplane mode.

Special configurations of some networks may cause your phone to be out of service, which can be restored after restarting your phone or turning on airplane mode.

5.Please reset your network settings.

6.Please remove the SIM card.

1) If your mobile phone card is a manually cut card, it may cause signal problems due to non-standard shape and poor contact, so it is recommended that you bring your personal ID card.

Go to the operator's business office 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.

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

If your phone is still out of service, please contact HUAWEI Consumer Service** Biquela (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 the relevant purchase voucher, and go to a nearby Huawei customer service center for testing.

Huawei Customer Service Center.

Boarding service. Repair spare parts** inquiry.

The reasons for the lack of service are as follows;

1.Damage to the SIM card leads to no service due to inability to read the SIM card, 2The hardware failure of the mobile phone leads to the inability to read the SIM card resulting in no service, 3

Software conflict resulting in inability to read the SIM card resulting in no service, 4There is no signal coverage in the area, resulting in no service.

Resolution; 1.Go to the business hall to make up for a new card to use, 2Go to a nearby mobile phone store or after-sales inspection and repair.

3.Delete the relevant software or restore the factory settings directly.

4.Change the place where the signal is good, and there will be a service signal.

3 possibilities:1You've dismantled the machine without permission. As a result, the copper points of the antenna are not in place. 2.There is a problem with the underlying communication module of the mobile phone. 3.Signal transmission is unstable. Is it electromagnetic shielding or interference from the surroundings?

What a system of mobile phones.

If there's a problem with the phone, go fix it.

If there is no service on your Samsung phone, it is recommended that you:

1.Try to replug the SIM card.

2.Try to change the geolocation.

3.Try to change another SIM card.

4.Back up your data (contacts, messages, **, etc.), factory reset attempt.

If the problem persists, it is recommended that you bring your mobile phone, purchase invoice, and repair card to your local Samsung after-sales service center for testing.