1. Shut down, restart and try to search the network again.
2. If it is a dual-card mobile phone, please check whether the SIM card is turned on: Settings -SIM Card Manager -SIM 1/SIM2- Click the SIM card icon-Slide to open (the operation of different models of mobile phones may be slightly different).
3. If there is still no signal, it is recommended to turn off the mobile phone, take out the SIM card, clean the SIM card chip with an eraser and reinstall it.
4. If it doesn't work, please try to change to another location to rule out whether it is caused by poor signal coverage at this location.
5. Try to change the network mode to 3G or 2G (don't choose automatic connection mode). Note: Some machines do not support changing the network mode.
6. Try to replace another SIM card.
7. Update the mobile phone system version: Settings-About the mobile phone (about the device)-Download the update manually/automatically (software update/system update-update). Note: Please back up data (contacts, information, pictures, etc. ) in the device.
If there is still no signal or emergency call after the above operation, please bring the purchase invoice, maintenance card and machine to Samsung service center for inspection.
Why is there no signal on the telecom card?
If your mobile phone can't support CDMA network, you can't use the telecom mobile phone card. Telecom mobile phone cards can only be used on telecom or full netcom mobile phones that support CDMA networks.
I want to know why there is no signal on the telecom card. Hello, restart the phone first and see if the card in the card slot is loose. Then you can change the card to see if it can be used, or you can try putting the card in another mobile phone. If nothing works, I suggest you go to the telecom business hall to test the machine card!
Why is there no signal when the telecom card is plugged in? Hello.
It may be that your mobile phone does not support telecom CDMA network, so you need to use telecom mobile phone card on the telecom version or full netcom version that supports network.
Why is there no signal on my telecom card? If there is no signal on my mobile phone or an emergency call prompt is displayed on the screen, I suggest:
1. Shut down, restart and try to search the network again.
2. If it is a dual-card mobile phone, please check whether the SIM card is turned on: Settings -SIM Card Manager -SIM 1/SIM2- Click the SIM card icon-Slide to open (the operation of different models of mobile phones may be slightly different).
3. If there is still no signal, it is recommended to turn off the mobile phone, take out the SIM card, clean the SIM card chip with an eraser and reinstall it.
4. If it doesn't work, please try to change to another location to rule out whether it is caused by poor signal coverage at this location.
5. Try to change the network mode to 3G or 2G (don't choose automatic connection mode). Note: Some machines do not support changing the network mode.
6. Try to replace another SIM card.
7. Update the mobile phone system version: Settings-About the mobile phone (about the device)-Download the update manually/automatically (software update/system update-update). Note: Please back up data (contacts, information, pictures, etc. ) in the device.
If there is still no signal or emergency call after the above operation, please take the purchase invoice, maintenance card and machine to the nearest service center for inspection.
Why does my telecom card always have no signal? Hello.
This may be a problem with your mobile phone. You can try another telecom version or full netcom version. If this is still the case, you can call 10000 for consultation.
Why is there no signal on oppoa37 telecom card? If the phone has no signal, you can go to Settings-About Phone-SIM Card Status-Signal Strength to check the current signal of the phone. You can restart the phone or change the location to check whether the signal strength has changed.
A37 (mobile version) The main card supports mobile 4G/3G/2G, the auxiliary card supports mobile 2G, and the dual cards can be switched;
The main card of A37m (Full Netcom) supports mobile telecom 4G/3G/2G, Unicom 4G/3G and the auxiliary card supports mobile telecom 2G. It is not allowed to use two telecom cards at the same time, and the dual cards can be switched.
A37t (Mobile Strategic Cooperation Edition) One mobile card only allows mobile use of 4G network, the other card only supports 2G network, and Unicom card supports 3G network at most. When the mobile card is not used, Unicom's 4G network can be used normally, but telecom cards are not supported.
There is no signal on the telecom card. Did you buy the telecom version of dual-network dual standby? One of my colleagues used to buy mobile phones online, but I didn't see Unicom's cdma clearly. There is no signal when inserting the telecom card. I don't know about your situation.
If it's correct. It is estimated that there is something wrong with the mobile phone.
Why is there no signal on the telecom card now? This may be because the card is broken. I suggest you ask the telecom.
Why does my telecom card always have no signal? Why doesn't the telecom card have a network signal?
1, ask the manufacturer whether this model only supports telecom cards;
2. Check whether the SIM card is inserted correctly;
3. Enter the hardware test to check whether the SIM card works normally (please enter the engineering mode by Baidu this model of mobile phone);
4. Try to change different SIM cards to see if there is a signal;
5. Whether there is no signal in this area. Need to check whether other mobile phones on the same network have signals;
6. Back up the data, brush the firmware again, and select Double Clear at the same time;
7. Go to the local authorized service center or telecom business hall and ask an engineer to check it.