Samsung did not find a signal for the mobile network

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 the system version of your phone:

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 receipt, warranty card and device to the Samsung service center for inspection.

If you want to customize the machine, it is best to ask to move to the mobile business hall or 10086 to the mobile terminal service.

The mobile signal is unstable, just normal.

I just bought a Samsung mobile phone, and it was okay to use it for a month Later, when I walked to a place where the signal was weak, there was no signal, but other brands of mobile phones have signals.

Samsung phones do not have a signal 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 and try again;

2.Swap the SIM card to a family member's or friend's phone and try again;

3.Check to see if other Unicom users around you have a signal;

If there is no signal, you can contact human customer service for feedback.

Is it that the signal you have there is not good, you put your mobile phone card into other mobile phones to try, if you can play normally, then there is a problem with your mobile phone, my Motorola mobile phone also has this problem, to their after-sales they have no way to explain, and they can't repair it, and finally give a new machine.

Turn on the phone to see if the antenna is not in contact; If the contact is good, there is no signal; That is, there is something wrong with the motherboard of the phone; You need to find a professional.

Hello: According to your description, since you did not provide specific model information, you can try the following:

2.If possible, change the SIM card for testing.

3.(Back up data: **book, SMS, multi**, etc.), it is recommended that you restore the factory settings.

4.If it still can't be solved after factory reset, it is recommended to send the phone to the nearest Samsung service center for testing and further processing.

For specific service center inquiries, please click:

Samsung mobile phone is like that, I bought one for my wife, and there is often no information, and she often says that I give her badly! It's so depressing!

Reason: It may be out of the service area.

It may be that there is a major exam nearby, and the shield has blocked out the signal.

It may be that the mobile phone card slot is loose, and the mobile phone card cannot be correctly recognized.

Solution: Find a place with a signal.

Out of the effective range of the shield.

Take out the phone card and insert it back in.