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Select specifications which apply:

Click on this if you are not using a smartphone, but a classic cell phone.

Click on this if you use a smartphone.

Click on this if your 3G/4G USB dongle (also known as USB modem or Data card), which you connect to the computer, doesn't recognize SIM cards. If you are not sure how a dongle looks like, follow this link: https://goo.gl/hQG7lS

Click on this if you have tried all the other solutions but none of them worked.

Click on this if your phone's battery is easily removable.

Click on this if you use iPhone and it doesn't recognize SIM card(s).

Click on this if you use Motorola and it doesn't recognize SIM card(s).

Click on this if you use Samsung and it doesn't recognize SIM card(s).

Click on this if you use Nokia and it doesn't recognize SIM card(s).

Click on this if you use Alcatel and it doesn't recognize SIM card(s).

Click on this if you use Huawei and it doesn't recognize SIM card(s).

Click on this if you use Xiaomi and it doesn't recognize SIM card(s).

Click on this if you use Blackberry and it doesn't recognize SIM card(s).

Click on this if you use a phone made by different manufacturer from the ones shown here, and it doesn't recognize SIM card(s).

Click on this if you use ZTE and it doesn't recognize SIM card(s).

Click on this if your Android device doesn't recognize SIM card(s).

Click on this if your device runs on Windows Phone OS and doesn't recognize SIM card(s).

Click on this if you use LG and it doesn't recognize SIM card(s).

Click on this if you use HTC and it doesn't recognize SIM card(s).

Click on this if you use Sony and it doesn't recognize SIM card(s).

Click on this if your device runs on Blackberry OS and doesn't recognize SIM card(s).

Click on this if your phone's battery is not removable.

  1. Repair the device using the computer software

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  2. Clean the SIM card slot

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  3. Replace the SIM card slot

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  4. Set the SIM card in the correct direction

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  5. Replace the SIM card

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  6. Push down the metal SIM card holder

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  7. Restart the phone

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  8. Insert a piece of paper between the SIM card and the battery

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  9. Take your device to a repair shop

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  10. Reconnect the USB dongle to the computer

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  11. Clean the SIM card

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  12. Gently lift the stuck contact of the SIM card slot

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  13. Unlock the mobile device

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  14. Replace the USB dongle

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  15. Buy a new phone

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  16. Reinstall the dongle driver in the computer

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  17. Make sure that the SIM card tray is tightly seated

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  18. Reset the phone to the factory settings

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  19. Turn off the Airplane mode

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  20. Check if the dongle is locked to a certain carrier

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  21. Update the device's operating system

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  22. Report the issue to the manufacturer

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  23. Install the appropriate driver in the computer

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  24. Clean the computer's USB ports

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  25. Update the dongle's firmware

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  26. Reset network settings

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