The mobile phone shows no service, what should I do if the wireless network can be used?

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, check whether the SIM card is activated: Settings - SIM Manager - SIM1 SIM2 - Click the SIM card icon - slide to turn on.

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 receipt, warranty card and device to the Samsung service center for inspection.

According to the information you provide, if you mean that the mobile phone cannot be used "without service", 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.

If it means that the mobile phone card cannot be used, the reasons are as follows:

1. The contact between the metal contacts of the mobile phone card and the mobile phone is insufficient;

2. The mobile phone card is damaged;

3. Whether the location is a signal blind area or suddenly no signal.

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 you have the conditions, you can use another mobile phone to see if there is a local signal, the second is to see if there is a problem with the mobile phone settings, and the third is to turn off and restart, and then try again.

Restart, and then if it doesn't work, go to the business hall to get a new card.

Either they suddenly entered an area with no signal coverage.

Either there is a shield nearby.

It's also possible that the phone is broken.

Generally, you can walk a distance to know what kind of problem it is.

No service is because there is no signal on the phone, see what causes it and fix it:

1. Check whether the SIM card is inserted into the mobile phone: you need to insert the SIM card to connect to the signal.

2. 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 sales office to replace the SIM card.

3. No service 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.

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

Handling 5G is one step faster, the traffic is half cheaper than 4G, the broadband speed is 500M, and it is convenient and fast to log in to the online business hall of Guangxi Telecom to handle broadband, number card, traffic package, etc. with one click. Customer service number 49 will answer for you.

In this case, it is very likely that the power amplifier or other parts of the signal part of the mobile phone motherboard are broken, or it may be the settings, or the remote area you are in will affect the signal.

If you are using a Huawei phone.

When your phone shows no service, it is recommended to take the following methods to try to solve it:

1.Avoid using magnetic metal cases, magnetic stands, or magnetic chucks.

If your phone uses a metal case, magnetic case, magnetic bracket or magnetic chuck, it is recommended that you remove it and try it, as metal and magnetic materials can easily interfere with the signal and cause the phone to be out of service.

2.Please rule out network causes.

1. Try changing your current location.

In some more enclosed indoor environments, such as buildings with dense spacing, cell phone signals may be blocked, resulting in no service.

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 service.

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 try resetting the APN

Incorrect APN settings will affect the normal use of the network.

Method 1: aClick Settings;

c.Click on the APN name (APN) to go to the APN page.

d.Turn on the three-dot button or four-dot button in the upper right corner;

e.Click Reset to default.

Method 2: If your phone is EMUI and above or Magic UI and above, or HarmonyOS and above, you can also follow the steps below:

a.Click Settings;

b.Click Mobile networks.

Then tap Mobile Data;

c.Click on the APN name (APN) on the Mobile Data page to go to the APN page.

d.Turn on the three-dot button or four-dot button in the upper right corner;

e.Click Reset to default.

Settings > Wireless & Networks > Mobile Networks > Access Point Name (APN) > turn on the three dot buttons in the upper right corner > reset to default.

3) Please reset the network settings.

On the Reset Network Settings page, click Reset Network Settings (for dual-SIM phones, select the ** card you want to restore), and enter the lock screen password according to the on-screen prompts.

Click Reset Network Settings, and a message will be displayed at the bottom of the screen that the network settings have been restored.

3.Please troubleshoot the SIM card.

It is recommended that you have a different SIM card with the same carrier.

Install it in 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.

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

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 (WeChat QQ and other apps need to be backed up separately), and bring your purchase voucher to a Huawei customer service center near you.

Hello, according to your description, please first confirm that the wifi router can connect to broadband normally, and then check whether the router password has a second encryption authentication, if it is all right, it is recommended to restart it.

Settings, Mode, Check. If there is any situation that affects the use of the airplane mode, adjust it in time.

Restart your phone and give it a try.

The phone card may also have poor contact, fiddle with it, and gently tap it on the palm of your hand to see if there is a change in the signal.

Find other family members or friends around you to learn from them and help you take a look.

The mobile phone can be connected to the wireless setting, which means that the mobile phone can be connected to wireless wifi, and the display of no service means that either your mobile phone card is broken, or there is no signal in your current area.

Wi-Fi has nothing to do with whether there is a mobile phone service or not! No service means that your SIM card is not installed properly!

It's either a network failure or something wrong with your phone.

It may have something to do with where you are.

The mobile phone clearly shows that it is connected to WiFi, but it can't connect to the Internet?

Take out the card and reinstall it.