The mobile phone card is stuck in the phone and there is no response? What should I do if the mobile

1: The SIM card is not detected, resulting in the SIM card not being recognized.

Problem symptom: The status bar above the phone displays a SIM card icon with an exclamation mark on it.

The mobile phone can only recognize 1 SIM card with 2 SIM cards, and the status bar only shows one card signal, and the other SIM card does not have any prompt.

Solution: 1. Please confirm whether the SIM card is placed correctly, whether the notch of the SIM card corresponds to the card slot, if it is a non-standard SIM card or cut the card by yourself, it may not match the card slot, it is recommended that you replace the standard SIM card.

2. Please confirm whether the surface of the SIM card is dirty, and it is recommended that you clean it briefly; If the SIM card connection point is seriously worn, or the discoloration cannot be cleaned off (the metal surface may be oxidized), it may lead to poor contact, and it is recommended that you change to a standard SIM card.

3. Please try to insert other normal SIM cards to confirm whether there is a problem, if there is no problem, it may be that your SIM card is damaged, it is recommended that you go to the nearest network operator business office to replace the SIM card.

2. The SIM card is detected and recognized, but the status bar shows that there is no network.

Problem Description: A signal bar icon is displayed in the status bar at the top of the phone, but the signal is displayed as X.

Solution: 1. Please confirm whether the corresponding SIM card has been enabled in the dual SIM management.

2. It is recommended that you restart your mobile phone to try, some models do not support hot swapping, and you need to restart it before you can search the network again.

3. If there are problems with the mobile phones that use the same operator's network around, it may be that the local network is abnormal, it is recommended that you dial ** in another place to try, or consult the operator.

4. Dual 4G models or some mobile customized models are not supported, only 2G 3G network is available as a secondary card, and there will be no signal if the local 2G 3G network is not covered.

5. Please install the SIM card of the same operator in other normal use to the same card slot location of the machine, if there is no problem, it may be a SIM card problem, it is recommended that you contact the operator to replace it.

6. Some models do not support CDMA network, if you insert the mobile phone card of the CDMA operator (such as China Telecom SIM card), there may be no signal in the mobile phone.

7. If the domestic version of the mobile phone is used abroad or the overseas mobile phone is used in China, there may be a mismatch between the frequency band of the mobile phone and the operator. If your SIM card is roaming internationally, please pull down the status bar, press and hold the mobile data icon to enter the mobile network settings interface, select the network operator, turn off automatic selection, and the phone will start to search for the operator manually.

8. At present, Huawei mobile phones do not support 2 telecom cards, and dual telecom card standby can only be realized after the VOLTE function is enabled on the secondary card (VOLTE is not supported overseas).

The phone doesn't recognize the SIM card.

It is recommended that you: 1. Turn off the airplane mode of your mobile phone and then turn it on for observation;

2. Reinsert the SIM card to ensure that the SIM card is in good contact with the mobile phone;

3. If you are using dual SIM, please turn on the turned off SIM card switch in the SIM card management of your mobile phone;

3. If conditions permit, please replace the SIM card of the mobile phone that supports the standard or compare the SIM card with normal function and no damage;

4. Back up your phone information (**number, SMS and**, etc.) and restore it to factory settings.

or brush processing;

The above methods cannot be solved, please back up your mobile phone information, bring your mobile phone invoice, warranty card and mobile phone to the nearest local OPPO customer service center for testing and solution.

1. It may be that the mobile phone card is broken or burned, you can take the ID card and mobile phone service password to communicate 100 to replace the new card; Second, it may be that the mobile phone card is loose, you can plug and unplug it a few more times.

How to deal with SIM card not recognized by mobile phone:

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 slot, or even be unable 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 SIM card is answered whether the gap and the card slot correspond;

Fourth, 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 probabilistic 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 invoice to the after-sales service point for maintenance.

Start by determining if it's a problem with your card or your phone.

If your phone can't read the card or the SIM card can't be detected, there may be one of the following situations:

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

Second, the mobile phone card is damaged.

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

Fourth, you can try to put the card on other mobile phones to try, and judge whether it is a problem with the card or the mobile phone through the method of changing the card and changing the phone.

You turn off your phone, then take out the memory card and the ** card, put it on the table and drop it a few times, and then put it back on and try it.

The SIM card inserted on the mobile phone does not respond, the mobile phone card may be dirty, the mobile phone card is slightly damaged, the mobile phone card slot is damaged, or the mobile phone is damaged

1. Tell if it's a problem with your mobile phone. Try inserting the SIM card into another mobile phone, if it can be used, it means that there is a problem with the contact between the mobile phone or the SIM card and the mobile phone.

2. Restart your phone and see if the problem is solved.

3. Insert and unplug the SIM card repeatedly to see if the SIM card is not installed properly.

4. Pull out the SIM card, wipe the surface with detergent (or coarse cloth, towel, eraser, etc.), wipe repeatedly until the shine is exposed, and reinsert it to see if the problem has been solved.

5. If it is a small SIM card, see if the edges are too rough or have bulges that cause poor contact, and smooth it in the place where the nail is sharpened with a knife or nail clipper.

6. The SIM card cannot be found on other mobile phones, indicating that the magnetic stripe of the SIM card may be damaged, and it is recommended to replace the SIM card.

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

If the above problems still exist, please back up the data in advance and bring the purchase invoice to the after-sales service point for maintenance.