Reasons and solutions for the card slot not recognizing the card: 1. Check whether the sim card is inserted backwards. If it is inserted backwards, you need to re-insert the sim card in the correct way; 2. Check whether the sim card is broken and Replace; 3. Check whether the phone is broken and replace it; 4. Check whether the sim card slot of the phone is loose and you can move the sim card back and forth; 5. Check whether the sim card slot of the phone is broken and needs to be sent for repair.
The operating environment of this tutorial: MIUI12.5 system, Xiaomi 11 mobile phone.
Why can’t the card slot be recognized?
(1) Check the SIM card insertion situation
Check whether the SIM card is inserted backwards. If it is inserted backwards, the mobile phone will definitely not be able to read the SIM card. Then We need to reinsert the sim card in the correct way.
(2) Check and verify whether the sim card is broken
Change to a normal mobile phone, put the sim card on another normal mobile phone, and see if it can be recognized SIM card, if other people's normal mobile phones cannot recognize the SIM card, then it means that the SIM card is broken.
(3) Verify whether the phone is broken
Get a sim card that can be used normally in someone else’s phone, and put it on a phone that cannot recognize the sim card. If it is a normal sim card, If it cannot be recognized, it means that some parts of the phone are broken. It may be a hardware problem or a software problem. This requires detailed analysis.
(4) Check whether the sim card slot of the mobile phone is loose
For some people who sell mobile phone products, they may often need to remove and insert the sim, which can easily cause poor contact of the sim card. To solve this problem, before inserting the SIM card, we can gently press down the metal fixed spring on the SIM card. After inserting the SIM card, press it gently again, or move the SIM card back and forth.
(5) Check if the sim card slot of the mobile phone is broken
For some sim card slots that are not of very good quality, if you frequently remove and insert the sim card, the sim card slot may be damaged. If we put the sim card on a normal mobile phone and it can be recognized, but if the sim card of other normal mobile phones cannot be recognized on our mobile phone, then the sim slot may be really broken and we can only send it for repair and then further determine the cause. .
Extended information
Precautions for using SIM card
1. Do not bend the card, especially the metal contact points on the card. careful.
2. The metal contact points on the card should be kept clean to avoid being contaminated with dust.
3. To avoid scratching the metal contact points, do not remove or insert the smart card from the phone unless necessary.
4. Do not place the card in a place where the temperature is lower than -20℃ or higher than 85℃, and avoid using it in high temperature situations.
5. This card is only suitable for GSM digital mobile phones approved for network access. Otherwise, the card may be damaged. Please turn off the card for 10 seconds to prevent the card from exploding.
6. To prevent phone theft, please do not store the card and password together.
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