What s going on with the mobile phone telecom card without signal

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 invoice, warranty card and machine to the nearest service center for inspection.

Telecom card no signal reasons: the surrounding environment network is poor, some reasons of the system itself, the problem of the mobile phone SIM card, the mobile phone can not connect to the network, the mobile phone suddenly has no signal to display into the no service state, it may be that the system program of the mobile phone is faulty.

1. The surrounding environment network is relatively poor

The poor network of the surrounding environment will cause the signal to be in a state of no service, and the signal will be in a state of no service due to the poor network of the surrounding environment.

2. The system itself:

Due to some reasons of the system itself, the mobile phone cannot be connected to the network, due to the reasons of the system itself, the mobile phone cannot be connected to the network before the connection, by restoring the network settings, restoring to the default factory settings to solve the problem of no service, or by restarting the mobile phone.

3. The problem of the SIM card of the mobile phone is that the mobile phone cannot be connected to the network

If you have a problem with the SIM card of your mobile phone, take out the SIM card and check whether it is damaged or worn. There are some vulnerabilities in the iOS system of the Apple mobile phoneThere are some vulnerabilities in the iOS system of the iPhone, which will cause the mobile phone to be unable to search the network and display no service status, so update the system of your mobile phone to the latest version.

4. Suddenly, the mobile phone has no signal and enters the no service state

First confirm whether you have inserted the correct SIM card, re-insert and unplug to try, enter a special number in the dialing interface to enter the hardware detection mode, if the status is abnormal, try to change a SIM card, if you confirm that the SIM card and related settings are not problematic, you can only restore the phone to factory settings to try or ask professional maintenance personnel to check and replace.

5. It may be that the system program of the mobile phone is malfunctioning

It may be that the system program of the mobile phone is faulty, and you can turn off the mobile phone and restart it again to let the mobile phone automatically connect to the network. <>

The reasons and solutions for no signal on telecom mobile phones are as follows:

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 family with 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 no service is 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 makes Zhaoxianglu use it for too long, and with a valid certificate, you can go to the local business hall to reissue a card. <>

There are many reasons for this phenomenon, and it is recommended that you follow the following methods to troubleshoot.

1. Check whether the balance of the mobile phone ** card is sufficient;

2. Compare the SIM card with more cracked mountains and check whether the SIM is abnormal;

3. Go to the mobile phone "Settings" - About the phone "- SIM card status" - signal strength, check the signal strength, change the time and place contacts, and eliminate network problems;

5. Make sure that the phone is the latest version number, and the latest version of the state source limb will usually optimize the stability of the system.