How to Fix “SIM Card Not Detected” on Any Android Phone (100% Working Methods)

How to Fix “SIM Card Not Detected” on Any Android Phone (100% Working Methods)

If your phone shows No SIM Card, SIM Not Detected, or Insert SIM, it means your device is unable to read the SIM properly. This issue is common on Android phones and can happen even if your SIM is fine. Here are the most effective fixes that work worldwide on all brands including Samsung, Xiaomi, Vivo, Oppo, Pixel, Motorola and more.

1. Restart Your Phone

A simple reboot refreshes the network driver and clears temporary glitches.

  1. Hold the power button
  2. Tap Restart
  3. Wait for the device to reload the SIM

2. Remove and Reinsert the SIM Card

Most SIM errors happen due to improper seating or dust.

  1. Turn off your phone
  2. Remove SIM tray
  3. Clean SIM gently
  4. Reinsert properly
  5. Power on the device

3. Enable and Disable Airplane Mode

This forces the phone to reinitialize modem and SIM reader.

  1. Swipe down Quick Settings
  2. Turn on Airplane Mode
  3. Wait 10 seconds
  4. Turn it off again

4. Change the Network Mode

Incorrect network mode can cause SIM registration failure.

  1. Settings → Mobile Network → Preferred Network Type
  2. Try switching between 4G/LTE, 3G, or 2G

5. Clean the SIM Tray & Slot

Dust or moisture can block the SIM reader.

  • Use a dry microfiber cloth
  • Use a clean brush
  • Do not use liquids

6. Try the SIM in Another Phone

This helps identify whether the problem is with the SIM or your device.

7. Reset Network Settings

Resets radio, modem, APN, and SIM configurations without deleting personal data.

  1. Settings → System → Reset Options → Reset Network Settings

8. Update Your Phone Software

Software updates fix SIM detection bugs.

  1. Settings → System → Software Update → Check for updates

9. Disable “Dual SIM Mode” (If Using One SIM)

Some phones glitch when dual-SIM mode is active with only one SIM installed.

10. Check for SIM Lock

If your device is carrier-locked, it won’t detect SIM from another network.

  1. Settings → About Phone → Status → SIM Status
  2. If it says “Network Locked,” contact carrier to unlock

Final Fix: Contact Carrier or Service Centre

If none of the fixes work, your SIM reader may be damaged. A technician can replace the SIM slot or reader chip.

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