The mobile phone card is put into the mobile phone and cannot be recognized

Hello! Check to see if the SIM card is cropped properly, or try a different SIM card. If you are sure that there is no problem with the SIM card, you can go to Settings - More Settings - Factory Reset - Reset All Settings (Restoring All Settings will not lose data from your phone).

If the same problem persists after restoration, it is recommended that you go to the local after-sales service center to test your mobile phone, and the after-sales service center address can be found in the settings - more settings - after-sales service menu. You can also go to vivo official ** to check the address of the after-sales service center:

The reasons why the SIM card cannot be used are as follows:

1. The contact between the metal contacts of the mobile phone card and the mobile phone is insufficient;

2. The mobile phone card is damaged;

3. Whether the location is a signal blind area or suddenly no signal.

Maybe the mobile phone card is invalid!

If the SIM card icon does not recognize appears in the status bar above your phone, it means that your SIM card is not recognized, please follow the steps below to rule out whether the SIM card is recognized

1.Please restart your phone and try.

It is recommended that you restart your phone and let your phone re-read the "SIM card" before trying.

2.Please observe whether the SIM card looks good or not.

1) Observe whether the metal surface of the SIM card is dirty, clean the dirt on the surface of the SIM card, and avoid poor contact that causes the SIM card to be unrecognized.

2) If you are cutting your own SIM card, it is likely that the SIM card cannot be recognized due to the non-standard shape of the SIM card and loose installation in the card tray, resulting in poor contact. It is recommended that you bring your ID card to the nearest operator's office to change the standard SIM card.

3.Please test whether the SIM card can be used normally.

If your SIM card is not recognized on other mobile phones, or if other SIM cards are recognized on your mobile phone, it is likely that your SIM card is malfunctioning, and it is recommended that you bring your ID card to the nearest operator's business office to replace the standard SIM card.

4.Please check if the SIM card is placed in the corresponding card slot.

Some mobile phones only support a single SIM card, the inside of the card tray is the NM card slot, and the outside is the SIM card slot, please refer to the logo on the card tray frame to put the card, the SIM card and the NM card will not be recognized if the card is placed incorrectly.

If the problem persists after attempting the above methods, we recommend that you back up your data in advance (third-party applications such as QQ and WeChat must be backed up separately) and bring the relevant purchase voucher to a Huawei customer service center near you.

Huawei Customer Service Center.

Make an appointment for service. Repair spare parts** inquiry.

Please check the following reasons.

The SIM card is reversed, the SIM card is broken, the phone is broken, the SIM card slot is loose, and the SIM card slot is broken.

1. SIM card reverse: check whether the SIM card is reversed, the mobile phone cannot read the SIM card after inserting the SIM card backwards, you need to reinsert the SIM card in the correct way.

2. The SIM card is broken: put the SIM card on the mobile phone that can be used normally, and see if the SIM card can be recognized.

3. The mobile phone is broken: take a SIM card that can be used normally, and put it on the mobile phone that cannot recognize the SIM card, if the normal SIM card cannot be recognized, it means that some parts of the mobile phone are broken and need to be repaired.

4. Loose SIM card slot: often unplugging and inserting SIM is easy to cause poor SIM card contact, before loading the SIM, you can first gently press down the metal fixed shrapnel on the SIM card, after loading the SIM card, gently press it again, or move the SIM card back and forth.

5. The SIM card slot is broken: for some SIM card slots that are not of very good quality, often unplugging the SIM card may make the SIM card slot bad, and the SIM card can be identified by placing it on a normal mobile phone, and the SIM slot is broken if other sims are not recognized on the mobile phone.

Either the mobile phone card is bad, or the mobile phone does not support the type of ** card, just like the mobile phone supports Unicom mobile card, does not support telecom card, you insert the telecom card will not be recognized, good luck!

What should I do if my phone doesn't recognize the SIM card? Don't go to a mobile phone store, try these methods now!

How is it broken, model? Try to change the card first, if it still doesn't work, there may be a problem with the card slot. If it's broken after pulling the card, it's basically a card slot problem.

Also, see if there are any settings about the baseband (modulation firmware) in the phone. If not, there is a problem with the signal part and not the card is not recognized.

Vivo mobile phone SIM card is not recognizedTroubleshooting method:

1. Restart your phone and try.

Please restart the phone, the phone will re-read the SIM card to see if it can be restored.

2. Check your phone's settings to see if the SIM card is enabled.

Go to the phone settings - mobile network - SIM card information and settings - click to enter the corresponding SIM card to enable the SIM card, make sure the switch is turned on.

3. Check whether the SIM card is installed backwards.

Please refer to the card installation steps in the user manual to check whether the SIM card is loaded in the correct direction.

Check the card installation steps: Go to Settings - System Management - Customer Service - User Manual - Mobile Phone Overview and Quick Start Installation and Preparation.

4. Check whether the SIM card looks good.

Observe whether there are stains on the metal surface of the SIM card, clean the stains on the surface of the SIM card, and avoid the SIM card being unrecognized due to poor contact. If you use a cropped SIM card, the shape of the SIM card may not be standard, resulting in poor contact and the SIM card cannot be recognized, it is recommended that you go to the operator's office to replace it with a standard SIM card.

5. Cross-validation.

Please install the SIM card to other devices, or install other SIM cards to your mobile phone for comparison and testing to determine whether it is a SIM card failure.

6. Resetting the network settings will delete and disconnect the connection and pairing records of WLAN, mobile data network, Bluetooth and other networks, and you can enter the phone's settings - system management - backup and reset - reset network settings - enter the lock screen password.

Note: Go to "Cloud Services" - Device Cloud Backup - Backup Data Type - Open "System Data" - Return to the previous page - Back up now to back up some system settings data.

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

Here's how to deal with the OPPO OnePlus (ColorOS system) phone not recognizing the SIM card:

1.Reseat the SIM card;

2.Please insert the SIM card into another mobile phone and see if it can be recognized normally? If not, it may be that the SIM card itself is faulty, and you can consult the operator's business office to replace the SIM card;

3.If the slag key of the problem prototype does not recognize all SIM cards, but these SIM cards can be recognized by other mobile phones, you can back up the data first, and then check whether it is restored through Settings > System Settings > Reset Phone > Restore All Settings Items;

If you haven't restored it, make sure that all important data is backed up and then select it"Erase all data completely" ；

If you still have questions, please bring the purchase invoice, warranty card and mobile phone to the nearest OPPO customer service center and be tested and processed by professional engineers. Before you go, please back up and migrate your mobile phone data in advance (the data of the safe and QQ WeChat need to be backed up and migrated separately).

There are three possibilities, one is that your SIM card 2 has been invalidated; The second is that your mobile phone card slot is damaged; The third is that the SIM card is not inserted properly.

If it is the first reason, you can check the business office of the SIM card to determine whether the card is still valid;

If it is the second reason, you need to take the mobile phone to the original factory or mobile phone repair shop for consultation or repair;

If it's the third reason, then you just need to pay attention to the card slot, try to insert the SIM card 2 again, and then reboot.

The phone doesn't recognize the SIM card.

Solution: 1. Please confirm whether the SIM card type is correct according to the mobile phone model. An incorrect SIM card can damage the card tray and card slot or even fail to be removed;

2. Please make sure to use a standard SIM card. Do not use a non-standard SIM card or cut the card by yourself, cutting the card can easily cause the SIM card to be unable to recognize or damage the mobile phone, it is recommended to go to the business hall to change the original standard SIM card;

3. Please confirm whether the card is placed correctly. Whether the notch of the SIM card corresponds to the card slot;

4. Please confirm whether the surface of the SIM card is dirty. If the SIM card has been used for a long time, you can wipe the surface of the chip with alcohol, or go to the business office to replace the original standard SIM card. If the SIM card is used for a long time, the metal surface is easy to be oxidized, which is easy to cause a probabilistic lack of card recognition;

5. Do not plug or unplug the SIM card when the device is turned on. After inserting the SIM card, please restart your phone and try;

6. If the problem still exists, please back up the data in advance, and bring the purchase of socks to the after-sales service point for maintenance.

Taking the SIM card of China Unicom mobile phone as an example, if it cannot be recognized, there may be the following reasons:

1. The contact between the SIM card and the metal contacts of the mobile phone is poor, it is recommended that you remove the SIM card and reinsert it into the mobile phone.

2. The SIM card does not match the mobile phone, it is recommended that you put the SIM card into someone else's mobile phone to try it, if it can be used normally, please bring the repair card and mobile phone to the mobile phone after-sales service provider to test the mobile phone; If it cannot be used normally, it is recommended that you bring a valid ID card and SIM card to the Unicom business hall to test the SIM card.