What s the matter with no cell phone signal Everyone else has it, but mine doesn t

It is recommended that you troubleshoot the problem by following the following methods:

Whether the SIM card is inserted correctly.

Whether the wrong SIM card is inserted, such as the standard version inserts the telecom SIM card, etc.

Go to Hardware Detection to see if the SIM card is working properly (enter * * on the dial screen). If the SIM status is normal, go to step 5, or if the status is unknown, go to step 4.

Try to replace a different SIM card, if the status is still unknown during hardware testing, it is recommended to go to the repair point for testing; If the detection status is normal, it is recommended to go to the carrier to replace a SIM card (the SIM card may be aging).

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

If the network type of the non-telecom mobile phone is CDMA automatic, you need to change the network type to "WCDMA Preferred" in the mobile phone information (**) to solve the problem.

Whether there is no signal in the area. You need to check whether other mobile phones on the same network have signals.

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

If the above methods still do not help you solve the problem, please go to your nearest repair center for repair and inspection.

Kids, your problem is that your phone is dripping. There's a signal. No signal? ......Make sure not to slap me with a brick before you look down.

1: You deduct the SIM card and put it back on...

2: The SIM card is damaged or invalid.

3: You are in a place where the signal is blocked or the signal is weak: a ravine, a building.

4: What brand is the mobile phone? It can't be Big Brother, right?

5: Which service provider is used for the card? I'm not going to offend anyone, hum don't say it. 6: You have selected Airplane mode in mobile mode. Switch to Standard.

1. There is no signal on the mobile phone, it may be the setting on the mobile phone, take a look at the airplane mode and turn it off to reappear the signal.

2. When the SIM card is not plugged in, there will also be no service problem of mobile phone display. Pull out the SIM card and insert it again. Let's see if it's back to normal. If the SIM card is broken, there will also be no signal.

3. There may be a problem with the network system. Reset network settings. After the phone restarts, see if there is a leaking signal.

4. When entering a confined space such as an elevator, there will also be no service. This can also happen when you go to a mountain or desert or other barren mountains. Leaving the area will return to normal. If not, just reboot it.

5. Restore factory settings or no service, it may be that there is a failure in the hardware of the mobile phone, then you need to go to the after-sales service of the mobile phone for further maintenance.

Sometimes the mobile phone does not have a wide bridge signal, it may be that there are too many cautious and fierce people who play ** when the same imitation disturbance is nearby, which exceeds the carrying capacity of the base station, or it may be too far away from the base station and the signal is too weak.

There are several reasons for this:

First, the SIM card and the mobile phone are not matched enough.

Second, there is no operator network service in the area where the mobile phone is located;

3. The SIM card is damaged or has poor contact;

4. The mobile phone signal is interfered with by other electronic devices;

5. Caused by poor contact between the SIM card and the card slot.

Usually in this case, you can change your location and use someone else's available SIM card to install it on your mobile phone to test the imitation annihilation test.

Reasons:1The current location of the mobile phone is in an area with no signal coverage;

2.The field strength is too weak, and the signal is too weak to connect to the base station;

3.Problems with the phone itself, such as a damaged signal receiver;

4.Errors on the SIM card;

Workaround:1Move your phone into signal range;

2.Redial, restart the device, and replug the battery to check if there is a signal;

3.Check if the SIM card is damaged;

4.Check for interference, such as roadside utility poles;

Precautionary measures:1Pay attention to the use of the telephone in the **, try to avoid using it in the area without signal;

2.minimise the use of radio equipment to avoid electromagnetic interference;

3.Check your phone's battery frequently to keep it in good condition;

4.Update your phone's firmware version to the latest to improve system performance.

There are three reasons why there is no signal: a mobile base station problem; mobile phone system problems; Problems with mobile phone cards.

In response to the above three problems, we can take the following steps to search for money:

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 that you contact the local business hall to deal with it.

2. Use your mobile phone to plug in other friends' mobile cards to try, if other cards don't work, then it may be a mobile phone system problem, it is recommended to contact the mobile phone after-sales service.

3. If you plug in other cards and have a signal, but you can't plug in your own card, then it may be a problem with your own card, and it is recommended that you take Hongdan with your mobile phone card to the local mobile business hall for testing.

If you are using a vivo phone, you can check the following methods:

1. Confirm whether to use third-party magnetic or metal accessories.

Please check whether you use metal protective shells, magnetic protective shells, magnetic brackets and other accessories, metal and magnetic materials are easy to interfere with signal reception, it is recommended that you remove the accessories to view.

2. Check whether the current environment covers the operator's network.

If you are in a closed indoor environment (such as a basement, elevator, etc.), the mobile phone signal may be blocked, resulting in poor signal, you can go to an outdoor environment to check. If you are in a remote area and the signal may be poor, you can determine whether it is the cause of network coverage by using the mobile phone signal of the same operator's network in the vicinity.

3. Check the SIM card and verify the cross-card swap.

Observe whether there is dirt or oxidation on the metal surface of the SIM card, and check it after cleaning. If you use a tailor-made SIM card, it is recommended to replace it with a standard SIM card. Install the SIM card to another device, or install another SIM card to your mobile phone for comparison and testing to determine whether it is a SIM card failure.

If it is a SIM card, it is recommended to go to the operator's business office to replace the card.

4. Reset 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.

5. Reset all settings.

After backing up the data, go to Settings - System Management - Backup & Reset - Restore all settings and follow the on-screen prompts.

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

6. Service center testing.

If the above method is invalid after the operation search, you can bring your mobile phone and purchase voucher to the customer service center for testing and processing in time, customer service center address: enter vivo official website vivo**app - my - service outlets or vivo official website web version - bottom - service support - service outlets query - select provinces and cities to query the address of the customer service center. It is recommended to contact ** in advance before going to avoid empty running, plan the itinerary reasonably, and travel safely.

Mobile phone communication is to send and receive signals through the network base station, and then communicate with the callee, such as the mobile phone shows no complete group service may be related to the following situations:

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 that there is no service as the reason for the SIM card.

4. If the SIM card of the mobile phone is accidental, and the network signal coverage area has no signal, it fails to reconnect to search the network and merge the book, at this time, you can manually search for the network registration front number cover 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.