What s the deal with the mobile card with no signal and no internet speed?

Mobile flower card is like this, no matter what method you use, the card is still a card, there should be no signal or no signal, it is recommended not to use the mobile one, change to another card.

Summary. Dear, the reasons are:1The 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 not working, and the mobile phone and the network base station cannot communicate.

2.The mobile phone is incompatible with the system due to the application software installed on the mobile phone, causing the system software to close 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 the same shows no service as the SIM card reason.

4.If the SIM card of the mobile phone fails to reconnect to the search network after there is no signal in the network signal coverage area, you can manually search for network registration under the menu of Settings - General - Network - Network Operator.

Dear, the reasons are:1The 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 not working, and the mobile phone and the network base station cannot communicate.

2.The mobile phone is incompatible with the system due to the application software installed on the mobile phone, resulting in the system software turning off 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 the same shows no service as the SIM card reason. 4.If the SIM card of the mobile phone fails to reconnect to the search network after there is no signal in the network signal coverage area, you can manually search for network registration under the menu of Settings - General - Network - Network Operator.

1. Check whether there is a signal for friends around you to use mobile phones, if other people's mobile phones also have no signal, it may be a problem with the local network base station, it is recommended to contact the local business hall to deal with it.

2. Use the mobile phone card to insert other friends' mobile cards to try, if it is not possible to insert other cards, it may be a problem with the mobile phone system, it is recommended to contact the mobile phone after-sales.

3. If you plug in other cards with signals, but only plug in your own card, then it may be a problem with your own bad card, it is recommended to take the mobile phone card to the local mobile business hall for testing.

If your phone is not able to access the Internet with mobile data, it is recommended that you:

1.Swipe down the top curtain of the screen to turn on mobile data.

3.Try a different SIM card or a different time period to troubleshoot network issues.

4.Upgrade your phone to the latest version.

5.If it doesn't work, please back up the data in your phone and restore the machine to factory settings.

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

1. Check whether this situation occurs in other mobile users around, if there is a similar situation, it may be a local network signal problem.

2. Check whether the "Mobile Data" switch is turned on. Check the Internet access settings of your mobile phone, and you can reset the network parameters and restart the operation of your mobile phone. Go to the mobile phone's [Settings] - [Mobile Network] (or Dual SIM and Mobile Network) - select the name of the card you need to access the Internet, keep the card slot you want to use open, click [Access Point Name (APN)] - click the menu key "Reset to Default Settings" (whether the traffic fee generated by the CMNet access point is included in **, please refer to the actual activation**).

3. Check whether there is still a phone bill in the account and whether the status of the mobile phone is normal.

4. Change the mobile phone to test whether the SIM is normal.

1. There is no service for the mobile phone card, it may be that the mobile phone does not support the network support of the current SIM card. For example, if the mobile phone is not a full Netcom mobile phone, then the telecom card cannot be used. At this time, you can use it by replacing your mobile phone with a full Netcom mobile phone.

2. If the SIM card of the mobile phone is damaged, you can place the SIM card in other mobile phones to try, if there is no service in other mobile phones, it may be that the SIM card is damaged. At this time, you need to bring your ID card to the nearby operator's business hall to apply for a replacement card.

3. The status of the mobile phone card is abnormal, if the mobile phone card has been cancelled or the application is reported as lost, then no service will also be displayed. You can call the carrier's customer service** through other mobile phones and ask the customer service if the status of the mobile phone card is normal.

4. There is no signal at the current location, if the location is relatively remote, such as in the basement, elevator or mountainous area, etc. At this time, there may be no signal from the operator, so the status of no service will be displayed. You can go to a place with a strong signal and try again.

5. There is a problem with the mobile phone, after eliminating the above problems, if it still shows no service, it may be a problem with the hardware of the mobile phone. If the phone is within the warranty period, you can go to the after-sales outlet for maintenance.

6. The mobile phone system version is problematic, the mobile phone card shows no service, and sometimes it may be a problem with the current software version of the mobile phone. You can try it after updating your phone's system version to the latest version.

7. Shutdown and restart attempt, another reason may be that there is a temporary problem with the system of Yuanliang Qi's mobile phone, and you can check whether the problem is solved after shutting down and restarting the phone. Or turn on airplane mode and turn off the attempt again.

The SIM card is not broken, but the phone has no signal.

Hello, the mobile phone card can not find the signal may be caused by many reasons: 1, mobile base station problem 2, mobile phone system problem 3, mobile phone card problem, so for the above three problems, it is recommended that you first check whether the surrounding friends use the mobile phone signal, if other people's mobile phones also have no signal, it may be the local network base station problem, it is recommended that you contact the local business hall to deal with it, and then use your mobile phone to insert other friends' mobile cards to try to accompany it, if you insert other cards will not work, then it may be a mobile phone system problemIt is recommended to contact the mobile phone after-sales service, if you insert other cards are signal, just insert your own card, then it may be a problem with your own card, it is recommended that you take your mobile phone card to the local mobile business hall for your reference, thank you for using.

The SIM card can't be read.

Let's talk about the simplest reason first, check whether the SIM card is reversed, if it is reversed, the mobile phone will definitely not be able to read the SIM card, then we need to reinsert the SIM card in the correct way.

Check to verify whether the SIM card is broken, change to a normal mobile phone, put the SIM card on another mobile phone that can be normal, and see if the SIM card can be recognized.

Verify whether the phone is broken, go and get a SIM card that can be used normally in someone else's mobile phone, and put it on the mobile phone that cannot recognize the SIM card, if the normal SIM card cannot be recognized, then it means that some parts of the mobile phone are broken, it may be a hardware problem, or it may be a software problem, which needs to be analyzed in detail.

Check whether the SIM card slot of the mobile phone is loose, for some people who do mobile phone product sales work, they may often need to unplug and unplug the sim, which is easy to cause poor contact of the SIM card, for this kind of problem, we can first put the metal fixed shrapnel on the SIM card gently pressed down, after loading the SIM card, gently press it again, or move the SIM card back and forth.

Check whether the SIM card slot of the mobile phone is broken, for some SIM card slots that are not of very good quality, if you often pull out the SIM card, it may make the SIM card slot bad, so that we can identify the SIM card on the normal mobile phone, and the other normal mobile phone SIM can not be recognized on our mobile phone, then the SIM slot may be really broken, and can only be sent for repair, and then further determine the reason.

SIM card is oxidized, basically metal will be oxidized, SIM is also part of metal, if the mobile phone is in water or SIM is soaked in water, then it may cause SIM card oxidation, so we need to Zen Brawl to pull out the SIM card, and then blow it slightly with a hair dryer, and then use a paper towel or towel to wipe off the gray oxide on the SIM card.

1. See if you can play**, if you can play ** but can't use the network, it may be a problem with the mobile phone;

2. If you can't play **, it may be a problem with the mobile phone, and the mobile phone may not support the card;

3. It may be that the card is broken;

4. If the card is not broken, restart the phone or turn off the data and then open it.

When the telecom mobile phone card cannot access the mobile network, it is generally necessary to confirm the model of the mobile phone first, and you can try the following operations:

Second, take out the SIM card first, then use the eraser to wipe the SIM chip, and finally reinsert the SIM card into the phone;

3. Try changing to another SIM card;

Fourth, if there is still no access to the mobile network, it is recommended to restore the factory settings, and note that before doing this operation, you must back up your important data. For example, **Ben, **, **, etc. Large basal branches.

Not enough to fight for wifi, modern people seem to be inseparable from wifi, go out to eat to ask the restaurant's Lingyin wireless password, go to a shopping mall to connect the wifi to be willing. But is the network really safe from the outside? At this time, the security shield of the WiFi hotspot is particularly important.