Why does Samsung S4 always show no phone card or graphics to restart, and what is the reason?

Hello dear Samsung users:

Based on your description, we recommend that you try it by following the steps below:

1.Turn the phone on and off again and check whether the SIM card is inserted in place and correctly.

2.Take out the SIM and clean the SIM card metal contacts with an eraser. (Whether it is a SIM card with poor contact).

3.Try to replace a SIM card (whether the SIM card is aged or damaged)4Back up your phone's data (book, SMS, multiple files, etc.) and restore factory settings.

Samsung knows that we will provide you with high-quality solutions and answer your questions attentively, and hope to get your satisfactory evaluation.

If this is the case, then there is a problem with the card slot, you had better check whether there is a problem with the system settings, such as airplane mode, or turn off any other software.

The mobile phone card is broken, my mobile phone is, try to change to a different mobile phone card to make it clear.

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Welcome to Samsung's Digital Services platform.

This is a common problem of Samsung machines, which needs to be repaired, and this kind of problem occurred in my use.

Is your phone okay, I have this problem with my phone recently, what should I do?

Solved it? How to fix it?

Samsung S4 mobile phone SIM card management can't be opened, and the display setting stops, which may be related to the phone software. Recommendations:

1.Restart your phone and try again.

3.Back up the data in your phone, and then try to do a factory reset (Settings - Reset Privacy Alert - Factory Reset).

If the problem clearly exists, it is recommended to send the mobile phone to your nearest after-sales service center for an engineer to test.

Hello: Hello! According to your description, it is recommended that you try to change another SIM card.

If it still doesn't work, it may be that the mobile phone software is abnormal, Lu Mingyu recommends that you restart the phone and then open it to try, if it doesn't work, back up the data of the hand huai machine (**book, short message, multi** files, etc.), restore factory settings (settings-reset-factory reset), if the fault is still the same, it is recommended that you bring the mobile phone three packs certificate, and send the mobile phone to the nearest Samsung service center for testing, please visit:

I hope the above reply can help you and have a great life!

First confirm if the inserted SIM card matches the phone. You can check the SIM card that can be matched with the mobile phone in the manual or on the official website; Secondly, check whether the SIM card is placed in the correct position; Or take out the SIM card after shutting it down and reinsert it to see if it can be detected.

If the above methods do not work, it is recommended that you try to change to another SIM card to rule out whether it is a SIM card problem. If you still can't recognize the SIM card, then connect to the Wi-Fi network and go to the phone settings to update the phone system to try.

If the problem persists after the above operations, then bring the purchase invoice, warranty card and mobile phone to the Samsung service center for professional maintenance.

If the SIM card gold finger touches the problem, wipe the gold finger with an eraser, or go to the business hall to reissue a card.

Mine is the same with really crashed Samsung good garbage.

I also want to say that my problem is exactly the same as yours, and I can't change to a new one, and I'm still thinking about it. I'm going to take it and fix it myself.

Hello dear Samsung users:

Either the card is broken, or the card seat is broken, send it for repair.

Based on what you said, I judge that there may be a problem with the SIM card slot on the phone.

You first use a soft cloth to gently wipe the metal piece of your phone's SIM card, and then put the phone's SIM card back on the phone again. If the mobile phone can return to normal operation, it means that the contacts of the mobile phone card are worn or oxidized, then apply for a replacement card at the mobile phone operator company (there will usually be two free replacement opportunities within a year). If the phone still appears after the above operations, then there is a problem with the SIM card slot in the phone.

The SIM card slot is a bit like the card slot of a memory card, and it also has contacts, and the card slot is also soldered to the phone's circuit board through pins. In this case, one is that the contacts in the card slot that are in contact with the SIM are loose, and the other is that the pins soldered to the circuit board in the card slot are desoldered.

In this case, you can't repair it yourself, so you can only send the phone to the mobile phone repair department for repair or replacement.

Hope mine can be helpful to you.

The above content is written based on the personal experience of "stupid and unknown", and only represents personal opinions and opinions, and no one is allowed to modify or delete them arbitrarilyPlagiarism is strictly prohibited. If you need to cite it, please indicate the source.

If your phone can't read the card or can't detect the SIM card, you can try to put the card on another mobile phone to try it, and determine whether it is a card problem or a mobile phone problem by changing the card and changing the phone.

Try my method first, 1,: wipe the SIM card with a dry cotton cloth, 2: try your phone with someone else's card. Tell me the situation after trying these two, and I will give you a satisfactory answer!

1. Restart your phone to see if the SIM card can be detected.

2. Check whether the phone has set the offline mode.

3. Check whether there is any insertion of the wrong SIM card (such as the mobile phone inserted into the telecom SIM card, etc.).

4. It may be that the SIM card contacts are oxidized, erase them with an eraser, or replace them with other SIM cards.

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

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

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

It may be that there is a problem with the card slot of the mobile phone, which causes the card information to be unable to be read normally, or it may be a problem with the card, you can try to dip a very small amount of alcohol in a paper towel (two pot heads are OK) and then gently wipe both sides of the card, but it is not recommended to use this method often, it is easy to damage the card after a long time.