Why Does My Xiaomi Phone Keep Disconnecting from Wi-Fi? (MIUI Fix Guide)

 

If your Xiaomi phone keeps disconnecting from Wi-Fi, you’re not alone. Many Xiaomi, Redmi, and POCO users report that their phone drops the Wi-Fi signal even when the router works perfectly. In most cases, this problem isn’t caused by hardware — it’s due to MIUI’s network management settings.

Did you know? For a complete guide on this topic, check out the Xiaomi Learning Hub and explore related tips in the Connectivity & Network Topic Hub.

🔹 1. The Real Reason: MIUI’s Wi-Fi Assistant

MIUI includes a feature called Wi-Fi Assistant, designed to automatically switch between Wi-Fi and mobile data for a stable connection. However, this feature sometimes misbehaves and causes your phone to disconnect when the Wi-Fi signal temporarily weakens.

To fix this, disable automatic switching:

Step-by-step:

  1. Open Settings on your Xiaomi phone.

  2. Tap Wi-Fi.

  3. Select Wi-Fi Assistant (or Additional settings, depending on your MIUI version).

  4. Turn off “Switch to mobile data when Wi-Fi is unstable” or “Select best networks automatically.”

Menu path:
Settings › Wi-Fi › Wi-Fi Assistant › Switch to mobile data automatically (disable)

After this, your phone will stay connected even when the signal is slightly weak.

🔹 2. Conflicting Power-Saving Settings

Another common cause is MIUI’s battery optimization. When Battery Saver is active, it may restrict background Wi-Fi usage.

To disable this:

  1. Go to Settings › Battery › Battery saver.

  2. Tap the app you use for Wi-Fi (for example, YouTube or Browser).

  3. Select No restrictions.

Tip: Avoid using Ultra Battery Saver mode if you often rely on Wi-Fi for calls or streaming.

🔹 3. Outdated System or Firmware

Xiaomi frequently fixes Wi-Fi bugs in MIUI updates.
Check for updates by going to:
Settings › About phone › MIUI version › Check for updates.

If your router is old, update its firmware from the manufacturer’s admin page — sometimes both devices need syncing.

🔹 4. Corrupted Network Configuration

If Wi-Fi keeps disconnecting even after changing settings, try resetting your network:

How to reset network settings:

  1. Go to Settings › Connection & sharing.

  2. Tap Reset Wi-Fi, mobile networks, and Bluetooth.

  3. Confirm the reset, then reconnect to your Wi-Fi network.

This clears out cached IP addresses and saved configurations that might be conflicting.

🔹 5. Advanced Fix: Forget and Reconnect

Sometimes the simplest fix works best.

Steps:

  1. Go to Settings › Wi-Fi › [Your Network].

  2. Tap Forget network.

  3. Reconnect by entering your Wi-Fi password again.

If the problem persists, reboot your router and ensure your device’s MAC address filtering isn’t blocking the phone.

🔹 Final Thoughts

If your Xiaomi Wi-Fi keeps disconnecting, it’s usually a software issue — not a faulty antenna. Disabling Wi-Fi Assistant, turning off aggressive battery saving, and resetting network settings solve the issue for most users.
Keep your MIUI up to date, and your Xiaomi, Redmi, or POCO phone will maintain a stable Wi-Fi connection with no random dropouts.

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