Why is there no network when the phone is turned off and turned on again?

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 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: 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.

If your phone is experiencing no service, 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 the local after-sales service center for testing.

Please visit the Service Center page on Samsung's official website.

I used to change a Unicom card, and at first I used it with a signal, but one day I turned it off and there was no signal after turning it on! And then it's here and there, depending on the mood! I thought the phone was broken, but when I plugged in the mobile card, there was a signal...

So why is this happening? So how to solve it?

Reasons why the mobile phone has no signal: 1. The mobile phone does not support this type of card. 2. Network mode problems. 3. Mobile phone hardware problems. 4. Problems with mobile phone cards. 5. Network coverage problems.

If there is no signal, I will choose to register in "Settings - Mobile and Network - Network Operator". If the registration is successful, there will be a signal.

but！Sometimes, even then, there is no signal! Sometimes the network mode will also cause no signal, you can switch the network mode, such as 3G to 2G, 2G> 3G> 4G signal.

If there is a signal in other cards, it means that the card slot is not broken, so insert the card into someone else's mobile phone to see if there is a signal, if there is no signal, it may be a problem with the card. The phone has been used for a long time, there will be some dust, and this situation may also occur, you can blow the card slot.

When I don't have a signal, it's an environmental problem. We all know that the signal can be blocked and interfered with, in the network coverage is relatively weak, such as in remote mountainous areas, if you have no signal when you insert any card, you use "automatic selection and manual selection" and there is no plug in other people's mobile phones, that is the problem of mobile phone hardware. Take it and fix it...

1. Check your phone's settings.

Open the mobile phone Quick Center (scroll down at the top or scroll up at the bottom) to see if the data network is turned on.

2. Confirm the status of the mobile phone card.

Make sure that the balance of the mobile phone card is sufficient, if the payment is in arrears, please restart the mobile phone after the recharge is successful. Check with your carrier to see if the data limit has been met or if the data network function is enabled. If necessary, you can change the SIM card that can access the Internet normally.

to confirm. 3. Check the mobile phone signal.

If your phone uses a metal, magnetic case or bracket that has an impact on your phone's signal, it is recommended to remove it and try it. If you are in an underground parking lot, elevator hall and other environments, the coverage of the mobile phone signal is susceptible to these environmental impacts, the Xinbi service will be relatively weak, and the data network will also be affected, it is recommended that you go to an open area, such as an outdoor open environment for testing.

4. Check the network permissions.

Please go to Mobile Phone i Manager - Traffic Management Traffic Monitoring - Network Management or Set Applications and Permissions - Permission Management.

Check whether the Internet access permission for the app is enabled.

5. Check the VPN (Virtual Private Network.

Please go to Settings - Other Networks and Connections - VPN, check and confirm whether the VPN is used, if so, it is recommended to turn off and try again.

6. Check the network settings.

Please go to Mobile Settings - Mobile Network.

SIM Card Information & Settings - Corresponding SIM Card ) - Access Point (APN) or Set Up Mobile Network Dual SIM & Mobile Network - Access Point (APN), tap"Reset to the default settings"restart your phone.

7. Re-search the network.

Please go to Settings - Other Networks & Connections to turn on"Airplane mode"After turning it off, the key ignites the 5G phone.

Please go to Settings - Mobile Network, turn it off and on again"5G enabled"Options.

8. Reset the network settings.

Go to Settings - System Management - Backup & Reset - Reset Network Settings - Select the corresponding SIM card - Reset Settings, and then use View.

Note: Resetting network settings resets Wi-Fi, mobile data, and Bluetooth connection records.

9. Reset all settings (do this when the user can't see the reset network settings menu).

Go to Settings - System Administration - Backup & Reset - Reset All Settings Go to Settings - More Settings - Backup & Reset - Reset All Settings and follow the on-screen prompts.

Note: Restoring all settings will not delete any data or files, only all settings of the phone will be restored, some third-party application accounts need to be logged in again, please confirm that it does not affect the use of the software before operating. For data security.

It is recommended to back up your phone data in advance before the operation.

I think there is still a problem with your mobile phone signal, and it is recommended to replace the mobile phone card with the same number of the new crack god or set up a state vertical network.

Every time the mobile phone needs to be turned off and turned on to connect to the network, it is generally the network error of the mobile phone service provider, or the network problem of the mobile phone. It may also be because some software in your phone will change your Internet service address. Check it out, hit the grip grind to your own cellular network operator and let them help you.

Duan Hall Bucket.

Every time the machine needs to be turned off and turned on again to dig and connect to the network, it is generally the network error of the mobile phone service provider, or the network problem of the mobile phone is dispersed. It is also possible that some software in your phone will change your Internet service address.

The electrostatic precipitator is a device that collects dust in flue gas by electrostatic purification method. It is an ideal equipment for purifying industrial exhaust gases. Its net profit work mainly relies on the residual circle resistance of the two systems of discharge electrode and precipitation electrode.

When the electrode space of high-voltage direct current is input between the two poles, anions and cations are generated, which act on the surface of the exhaust gas dust particles passing through the electrostatic field, move to the electrodes of opposite polarity under the action of the electric field force, and deposit them on the electrodes to achieve the purpose of dust collection. Both pole systems have rapping devices, when the hammer type periodically knocks the two pole devices upright, the dust adhered to them is shaken off, and falls into the lower ash hopper and discharged out of the ash discharge device through the ash discharge device. The purified exhaust gas is discharged into the atmosphere through the chimney from the outlet, and the cavity of the flue gas purification process is completed at this time.

Every time the mobile phone needs to be turned off and turned on again to connect to the network, it is generally the network error of the mobile phone service provider, or the network of the mobile phone is faulty. It may also be because some software in your phone will change your Internet service address. Check it out, call your own cellular network operator and let them help you.

1.Hit the system drop-down page and click the 'Settings' button to enter the system settings.

2.On the settings page, pull the scroll bar down a bit and you'll see 'Other Advanced Settings.''option, click to enter.

3.On the advanced settings page, you will see that there is an item of 'Power & Performance', click on the option to enter.

4.On this battery and performance settings page, click on the 'Power Saving Optimization' option.

5.Here we see the option of 'Timer power on/off'.

Hello, according to your description, you can set the mobile network to automatically select, and then try, if not, you don't need to restart the phone, turn on the airplane mode and turn it off again to re-search the network, the problem has always existed, it is recommended to go to the after-sales service to test the motherboard.

If the mobile phone card is not in good contact, you can also go through Settings - Operator Network - Mobile Data, Network Mode. Turn off the network data first, then adjust the network mode to 3G, and then turn on the network data, and then adjust the network mode to 4G. See if you can connect to the internet.

There are too many caches on the phone, and the memory is too small, which causes the phone to freeze, and the system automatically clears the cache after shutting down and connects to the Internet.

Generally, it is a network error or a mobile phone network problem with the mobile phone service provider. It is also possible that some software in your phone will change your network service address. Call your mobile network operator and let them take a look at it for you.

1. Please make sure that the SIM card is not disabled: Please search for and enter the SIM card management in the settings, and make sure the SIM card switch is turned on. Disabled SIM card will cause the signal bar to show no signal, or only one card signal.

2. Please make sure that you are in a good network environment, please try to change your current location: if your mobile phone has a poor signal in a specific area, or the mobile phone of a nearby friend using the same operator** card also has a poor signal, it may be caused by the poor network quality in your location, and it can be restored to normal after changing to other places. 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.

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 poor mobile phone signal.

4. Please restart your mobile phone or switch on and off the airplane mode: The special configuration of some networks may cause your mobile phone to have an unstable signal, no signal, or poor signal, which can be restored after restarting the mobile phone or switching on the airplane mode.

5. Please reset APN: Open Settings, enter APN in the search bar at the top, click Access Point Name (APN) to jump to the mobile data settings interface, click Access Point Name (APN) again, then click the three dots in the upper right corner, and select Reset to Default Settings to try.

7. Please take out the mobile phone card: If your mobile phone card is a manually cut card, 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. Dirty or oxidized SIM cards can also lead to poor contact, so it is recommended that you keep them clean.

8. Please update the mobile phone system to the latest version: It is recommended that you update the mobile phone system version in time.

9. Get more help: If your phone still has an unstable signal, no signal, or poor signal, please contact Huawei Consumer Service** (950800), or back up your data in advance (third-party apps such as QQ and WeChat need to be backed up separately), and bring your purchase voucher to a nearby Huawei Customer Service Center for more assistance. <>

The phone shows what's going on when it's turned off, but you can surf the internet.

If your phone appears sleepy and turned off, but you can still access the Internet, it may be due to one of the following reasons:1Show Questions:

There is a malfunction or display problem with the phone's screen, causing the display to appear as turned off. Try pressing the power button and see if you can wake up your phone screen. 2.

Software issues: It may be a problem with your phone's operating system or app that is causing the display to be abnormal. Try restarting your phone, i.e., press and hold the power button and select the restart option.

If the problem persists, consider doing a software update or factory reset. 3.Battery issues:

There may be an issue with the phone battery that doesn't provide enough power to boot the phone, but it can still connect to Wi-Fi to surf the internet. Try charging it for a while, then try to turn it on again. If none of the above solutions solve the problem, it is recommended that you contact the phone manufacturer's customer support or go to your local phone repair center for professional help.

They can further check and fix the problems with the phone.