Introduction

One of the most frustrating issues any smartphone user can face is when their phone suddenly won’t connect to Wi-Fi. If you own a Redmi 9C, you might have noticed that your device occasionally refuses to connect to a network, keeps disconnecting, or shows “Connected, but no Internet.”

Don’t panic — this problem is quite common and usually easy to fix. In this article, we’ll walk you through the reasons why your Redmi 9C can’t connect to Wi-Fi and how to solve it step by step.

Common Reasons Why Redmi 9C Fails to Connect to Wi-Fi

Before jumping into solutions, it helps to understand what might be causing the issue. The most common culprits are:

  1. Incorrect network settings — A wrong password, IP conflict, or saved configuration can block connection.

  2. Router issues — Your Wi-Fi router might be overloaded, outdated, or misconfigured.

  3. Software bugs — MIUI or Android updates sometimes cause temporary Wi-Fi glitches.

  4. Battery saver or background restrictions — These can limit network activity to save power.

  5. Hardware problems — In rare cases, the Wi-Fi chip or antenna inside your Redmi 9C may be damaged.

Now let’s fix each of these possible causes one by one.

1. Restart Everything (Phone and Router)

It sounds simple, but a reboot solves most Wi-Fi connection issues.

  • Step 1: Turn off your Redmi 9C completely and wait 30 seconds.

  • Step 2: Unplug your router/modem for 60 seconds, then plug it back in.

  • Step 3: Once the router is fully restarted, turn your phone back on and try reconnecting.

This clears cached connections, refreshes IP assignments, and often restores connectivity instantly.

2. Forget and Reconnect to the Network

If restarting didn’t help, the saved network data may be corrupted. To reset it:

  1. Open Settings › Wi-Fi.

  2. Tap the network name (your Wi-Fi SSID).

  3. Select Forget network.

  4. Wait a few seconds, then tap the same network again.

  5. Enter your Wi-Fi password carefully and connect.

This forces your Redmi 9C to create a new, clean connection profile.

3. Check Airplane Mode and Wi-Fi Toggle

It’s possible that Airplane Mode or network restrictions are accidentally enabled.

  • Make sure Airplane Mode is turned off.

  • Toggle Wi-Fi off and on again from Quick Settings.

  • If your phone automatically switches between mobile data and Wi-Fi, disable “Switch to mobile data automatically” under:
    Settings › Wi-Fi › Wi-Fi Assistant.

This ensures your Redmi stays connected to Wi-Fi without interruption.

4. Reset Network Settings on Redmi 9C

If the connection problem persists, reset all network configurations.

To reset network settings:

  1. Go to Settings › Connection & sharing › Reset Wi-Fi, mobile networks, and Bluetooth.

  2. Tap Reset settings and confirm.

  3. Reconnect to your Wi-Fi afterward.

This clears all old networks, paired Bluetooth devices, and network preferences, often resolving hidden conflicts.

5. Check Router Settings and Frequency Band

Sometimes the problem isn’t your phone — it’s your router.

Try these quick router checks:

  • Restart the router (as described above).

  • Make sure you’re connecting to the correct frequency:

    • The Redmi 9C supports 2.4 GHz Wi-Fi, not 5 GHz.

    • If your router uses only 5 GHz, enable 2.4 GHz in router settings.

  • Disable MAC address filtering on the router if active.

  • Move closer to the router to avoid weak signals.

You can log in to your router’s control panel (usually via 192.168.1.1 or 192.168.0.1 in your browser) to adjust these options.

6. Disable Battery Saver or Performance Modes

When Battery Saver, Ultra Battery Saver, or Performance Optimization modes are enabled, MIUI may restrict background Wi-Fi usage.

To check:

  1. Go to Settings › Battery › Battery Saver.

  2. Turn off Battery Saver.

  3. Go to Settings › Battery › Battery usage › Wi-Fi and ensure background connectivity is allowed.

After disabling these modes, reconnect to your Wi-Fi.

7. Update MIUI and Firmware

Software updates often fix Wi-Fi bugs. To make sure your Redmi 9C runs the latest version:

  1. Go to Settings › About phone › MIUI version.

  2. Tap Check for updates.

  3. If an update is available, download and install it over mobile data or another stable Wi-Fi network.

After updating, restart your device and test the Wi-Fi connection again.

8. Boot in Safe Mode (Check for App Conflicts)

Some apps, particularly VPNs or network-manager tools, can interfere with Wi-Fi. To verify this:

  1. Hold the power button.

  2. Tap and hold Power off until you see Reboot to Safe Mode.

  3. Tap OK to restart in Safe Mode.

In Safe Mode, only system apps run.

  • If Wi-Fi works properly here, a third-party app is the culprit.

  • Restart normally and uninstall any recent apps (especially network-related ones).

9. Clear Cache and Data of System Apps (Wi-Fi Services)

Sometimes MIUI’s internal services cause connectivity bugs. To clear them:

  1. Go to Settings › Apps › Manage Apps.

  2. Search for “Settings” and “Wi-Fi”.

  3. Tap each one › Storage › Clear Cache and Clear Data.

  4. Reboot your phone and reconnect to Wi-Fi.

This refreshes network configuration without deleting your personal data.

10. Factory Reset as a Last Resort

If none of the above fixes help, your MIUI system may be deeply misconfigured. Performing a factory reset can solve it — but back up your data first!

To factory reset:

  1. Go to Settings › About phone › Factory reset.

  2. Tap Erase all data (factory reset).

  3. Confirm and wait for the process to complete.

After the reset, connect to Wi-Fi during setup to confirm the issue is gone.

Extra Tips for Stable Wi-Fi on Redmi 9C

  • Avoid installing Wi-Fi booster or cleaner apps — they often cause more harm than good.

  • Keep at least 1 GB of free internal storage, as MIUI needs space for caching network data.

  • Avoid placing the router near walls or metal surfaces that block signal.

  • Use WPA2 or WPA3 security instead of outdated WEP encryption.

  • Change your router’s channel (1, 6, or 11 for 2.4 GHz) to reduce interference.

Possible Hardware Issues

If you still can’t connect to Wi-Fi after factory reset and router testing, there might be a hardware fault:

  • Wi-Fi antenna or chip damage (from drop, water, or heat).

  • Motherboard issues (rare, but possible).

In this case, it’s best to visit an authorized Xiaomi service center or a certified repair shop for inspection.

Conclusion

If your Redmi 9C can’t connect to Wi-Fi, don’t rush to a repair shop — most of the time it’s a simple configuration issue. Start with basic steps: restart devices, forget the network, and check the router band. Then move on to advanced fixes like resetting network settings, disabling battery saver, and updating MIUI.

With these 10 proven solutions, your Redmi 9C should reconnect to Wi-Fi smoothly and stay stable. And if the issue persists even after a full factory reset, that’s the time to consult a professional technician — hardware problems are rare, but possible.

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