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If you’re using a Xiaomi or Redmi smartphone and suddenly see “No Service”, “SIM Not Detected”, or “SIM Card Failed”, you’re not alone. Many users report Xiaomi network issues after system updates, SIM swaps, or accidental settings changes.

In this detailed guide, you’ll learn how to:

  • ✅ Fix SIM card no service Xiaomi

  • ✅ Solve Xiaomi network problem

  • ✅ Fix Mi phone no SIM card problem

These solutions work for most Xiaomi, Redmi, and POCO devices running MIUI or HyperOS in 2026.

Common Xiaomi & Redmi Network Problems

Before jumping into fixes, here are common error messages:

  • No Service

  • Emergency Calls Only

  • SIM Card Not Detected

  • SIM Card Failed

  • Invalid SIM

These errors can be caused by:

  • SIM card damage

  • Incorrect network settings

  • Disabled mobile radio

  • Software glitches

  • Carrier issues

Let’s go step-by-step to solve the Xiaomi network problem.

Method 1: Turn Mobile Radio Power OFF & ON (Hidden Testing Menu Fix)

This is one of the most effective ways to fix SIM card no service Xiaomi devices.

Steps:

  1. Open the Phone Dialer

  2. Dial this code:

    *#*#4636#*#*

  3. The Testing Menu will open.

  4. Select the SIM slot that has the problem.

  5. Check Mobile Radio Power:

    • If ON → Turn it OFF

    • Wait 10 seconds

    • Turn it ON again

This refreshes your phone’s connection to network towers.

✔ Many users fix the mi_phone no sim card problem at this stage.

Method 2: Change Preferred Network Type

Sometimes the issue is caused by incorrect network mode selection.

Steps:

  1. Go to Settings

  2. Tap SIM Cards & Mobile Networks

  3. Select the affected SIM

  4. Tap Preferred Network Type

  5. Choose:

    • Prefer LTE (Recommended)

    • If already on LTE → Switch to 3G

  6. Restart your phone

Switching network modes forces the device to reconnect properly.

Method 3: Restart Network Using Airplane Mode

This is a quick and easy trick to solve Xiaomi network problem.

Steps:

  1. Swipe down and enable Airplane Mode

  2. Wait 10 seconds

  3. Disable Airplane Mode

  4. Check if signal returns

This resets all wireless connections instantly.

Method 4: Reset Network Settings (Advanced Fix)

If the above methods fail, resetting network settings can fix hidden configuration errors.

Steps:

  1. Go to Settings

  2. Scroll to Connection & Sharing

  3. Tap Reset Wi-Fi, Mobile Networks & Bluetooth

  4. Choose the affected SIM

  5. Tap Reset Settings

⚠ Note: This will remove saved Wi-Fi passwords and Bluetooth connections.

Most Xiaomi SIM detection problems are solved after this reset.

Method 5: Check the SIM Card Physically

If you still experience mi_phone no sim card problem:

  1. Remove the SIM card.

  2. Clean it gently with a dry cloth.

  3. Insert it into another phone.

  4. Check if it works there.

If the SIM also fails on another device:

➡ Contact your network provider’s customer care.
You may need a SIM replacement.

Bonus Fix: Restart Your Xiaomi Device

Sometimes the simplest solution works:

  • Hold the power button.

  • Tap Restart.

  • Wait for the phone to reboot fully.

A system refresh can clear minor glitches.

Why Does Xiaomi Show No SIM or No Service?

Common causes include:

  • Software bugs after updates

  • Disabled radio band

  • Network coverage issues

  • Expired or blocked SIM

  • Corrupted network settings

Understanding the root cause helps prevent the issue in the future.

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