There was still a signal in the morning, why suddenly there was no signal at all

It's a complicated question. Let's experiment in many ways.

First, check the problem of the phone itself.

Reboot included. Check to see if the signal is turned off in the phone settings. Is it airplane mode and so on. If you confirm that there are no problems, proceed to the next section.

Second, see if the signal of your position is blocked.

There will be signal shielding near the college entrance examination center. Or, in your own house, there may be no signal, take it out and try it. Try it in the open.

Three. Carrier's base station issues.

The operator may have an emergency due to a power outage or a broken optical cable, in which case, ask someone nearby if the same operator has a signal. You can also use someone else's mobile phone to ask the phone operator.

Fourth, mobile phone bills or other setting problems.

In some cases, the machine will be shut down after the payment is in arrears, but there is still a signal. However, there are occasional operator errors that cause your SIM card to fail to receive a signal after arrears, and this problem cannot be solved by restarting.

In addition, pay attention to whether you have set up some special functions such as volte, but the operator has not opened it, which may also lead to it.

Hope it helps.

Hello. You can try it by reinstalling the SIM card and restarting the phone, or you can try it with another phone to determine if it's a problem with your phone or a phone card.

Operating device: Huawei mobile phone.

Operating system: Android

The mobile phone has a signal for a while and no signal for a while, and the reasons are as follows:

1. There is no signal or the signal is relatively poor, mainly because the signal will be affected by various factors such as terrain, landform, and high-rise buildings in the process of propagation, such as the current location is in a relatively closed place, and the signal may be affected.

2. The signal is transmitted from the base station, but the reception is done by the mobile phone, if there is a problem with the hardware of the signal receiving part of the mobile phone, it may also lead to this situation. There are also some software problems that can also lead to this situation, and the problem of the mobile phone needs to be solved by you to after-sales demand, and the problem of the SIM card can be solved by going to the operator's business hall to replace a new SIM card.

Ways to boost your cell phone signal:

1. Improve the reception position of the mobile **, because there are fewer obstacles such as buildings that can block the signal. If you are at the foot of a mountain or in a valley, start climbing. If indoors, try going upstairs and staying on the side of the house closest to the mobile company's launch equipment.

2. Since mobile radio waves have a hard time penetrating walls, standing next to an open window in your home or elsewhere may help you get a signal strong enough for an uninterrupted chain call.

3. Since mobile signals are blocked by building materials such as concrete and steel, as well as the earth, it is nearly impossible to make calls from buildings, basements, and underground parking garages. So, please go outside and you may feel a stronger signal. <>

The mobile phone signal has nothing to do with whether it is in arrears or not. It is estimated that there are three situations: 1. Your SIM card is broken; This possibility is relatively high, you try to change someone else's card; 2. If there is a problem with the mobile phone, you can see if the mobile phone display is normal and whether the buttons are out of order.

Generally speaking, a broken phone doesn't happen suddenly; 3. If you have a problem with the settings, such as setting it to airplane mode or no network mode, your phone will also have no signal.

1. Shut down and restart.

2. Take out the SIM card and reinstall it.

3. Observe whether there is a signal on nearby mobile phones and rule out network problems.

4. Whether the network type is correct and whether the operator selects whether it is automatic. (China Unicom selects 3G priority, mobile selects only 2G, and China Telecom selects automatic).

5. Back up the data, flash to the latest system version and try again.

6. Call the operator** (China Mobile 10086, China Unicom 10010) to check the network status 7.

Take the card out and reload it.

No more, you can only restore the factory. I have a mobile phone that is how I got it, for unknown reasons.

Of course, you first have to make sure that the SIM card is not broken. Put the phone card on another phone and try it to see if there is a signal.

The place is relatively remote and the signal is weak.

Maybe you are in the middle of one base station to another, and there is an error or delay in switching the cell phone signal to the base station.

If you buy a parallel import, it may be related to the hardware, due to the difference in hardware, the new baseband number is not compatible.

If you are using an Android device and have flashed an unofficial ROM, it is possible that the signal will suddenly lose due to the incompatibility of the ROM. My Android phone is often like this in the suburbs, suddenly there is no signal, turn on the airplane mode and turn it off, and the signal will be automatically searched again.

There is no signal on mobile phones because the signal will be affected by various factors such as terrain, landform, and tall buildings during the propagation process, 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 back on and off to see if there is a signal;

2.Change the mobile phone card to a family member or friend's mobile phone and try again to see if there is a signal, if the mobile phone card is installed in other mobile phones and there is no signal, it may be a problem with the mobile phone card, you can replace a new card;

3.See if other users around have a signal, if other users have a signal, then it may be that your mobile phone is faulty, it is recommended to restore the factory value test, if there is still no signal, there may be a hardware failure can be detected and dealt with by after-sales.

1. Turn off the power and take out the SIM card, and use the eraser to wipe the SIM card chip.

4. Try to change other SIM cards.

5. Try to change the position with a better signal.

If the problem persists, please bring the purchase receipt, repair card and machine to the Samsung service center for inspection.

Hello dear Samsung users:

Depending on your description, you can try the following:

1.Restart your phone or try to change the environment.

4.Turn off the power off and remove the SIM card, and use the eraser to wipe the SIM card chip.

5.Replace it with a different SIM card.

6.Back up your phone's data (**book, SMS messages, multi** data, etc.), restore factory settings attempt: Settings - Reset - Factory Reset.

If the problem persists after the above operations, it is recommended that you bring the purchase invoice, three-guarantee voucher and mobile phone to the local Samsung service center for testing by the engineer. For specific service center inquiries, please click:

Comments, suggestions, complaints, please click:

1. Turn off the power and take out the SIM card, and use the eraser to wipe the SIM card chip.

4. Try to change other SIM cards.

5. Try to change the position with a better signal.

1 is getting old 2 there are jammers around that affect the signal.