How to Fix Samsung Wi-Fi Disconnecting Frequently (One UI)

 Is your Samsung phone repeatedly dropping its Wi-Fi connection? This common problem can interrupt streaming, video calls, online gaming, and general browsing. Wi-Fi instability is usually caused by software bugs, network misconfigurations, battery optimization settings, or router issues. Fortunately, Samsung’s One UI provides several tools and settings to stabilize connectivity. In this comprehensive guide, you’ll learn how to fix Samsung Wi-Fi disconnections step by step, with practical tips for long-term reliability.

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

🔹 Why Samsung Wi-Fi Keeps Disconnecting

Understanding the root causes of Wi-Fi issues helps you troubleshoot more effectively:

  • Software glitches: Temporary bugs in One UI or outdated apps can disrupt Wi-Fi.

  • Network conflicts: Incorrect IP settings, DHCP conflicts, or corrupted Wi-Fi credentials can trigger drops.

  • Battery optimization: Aggressive power-saving features may limit background Wi-Fi activity.

  • Router or interference problems: Old firmware, crowded Wi-Fi channels, or physical obstructions weaken signals.

  • Hardware concerns: Rarely, the Wi-Fi antenna or internal components may be damaged.

1. How to Restart Your Samsung Phone and Router

The simplest and most effective first step is to reboot both your phone and router:

  1. Turn off your Wi-Fi router and wait 30–60 seconds before powering it back on.

  2. Restart your Samsung phone: press and hold the Power button → Restart.

  3. Reconnect to your Wi-Fi network after both devices reboot.

🔹 Why this works: Restarting clears temporary network errors, refreshes IP assignments, and resets the Wi-Fi handshake between your phone and router.

2. How to Forget and Reconnect to the Wi-Fi Network

Sometimes stored Wi-Fi configurations on your phone become corrupted, causing frequent disconnections. Forgetting and reconnecting usually fixes this:

  1. Open Settings → Connections → Wi-Fi.

  2. Tap the gear icon ⚙️ next to your connected network.

  3. Select Forget.

  4. Reconnect by entering the Wi-Fi password again.

💡 Tip: If your router supports 2.4GHz and 5GHz bands, try both. Use 2.4GHz for longer distances and better stability, and 5GHz for faster speeds at close range.

3. How to Turn Off Smart Network Switch

Samsung’s Smart Network Switch (or Switch to mobile data) automatically toggles between Wi-Fi and mobile data when the signal weakens. This can create frequent Wi-Fi drops.

Steps:

  1. Go to Settings → Connections → Wi-Fi.

  2. Tap the three dots ⋮ → Advanced.

  3. Toggle Switch to mobile data or Adaptive Wi-Fi OFF.

✅ This ensures your device remains connected to Wi-Fi even if the signal temporarily dips.

4. How to Exclude Wi-Fi from Battery Optimization

One UI’s battery-saving features can restrict Wi-Fi when the phone is idle or the screen is off. To maintain a stable connection:

  1. Open Settings → Battery → Background usage limits.

  2. Tap Sleeping apps and remove essential apps like Settings or System UI.

  3. Alternatively, go to Settings → Apps → [App Name] → Battery → Unrestricted.

💡 This ensures Wi-Fi stays active consistently, improving download stability and preventing random disconnections.

5. How to Reset Network Settings

If Wi-Fi problems persist, resetting network settings is often effective:

  1. Navigate to Settings → General management → Reset → Reset network settings.

  2. Tap Reset settings → Confirm.

  3. Reconnect to your Wi-Fi network.

⚠️ Note: This erases all saved networks, Bluetooth pairings, and VPN settings, but it solves many hidden configuration conflicts.

6. How to Update Samsung Software and Router Firmware

Keeping your devices updated ensures compatibility and fixes bugs:

  • On your Samsung: Settings → Software update → Download and install.

  • On your router: log in to the admin panel and check for firmware updates.

📌 Software updates often include Wi-Fi stability improvements, security patches, and bug fixes.

7. How to Change DNS Settings for Better Stability

Sometimes, unreliable DNS servers can cause intermittent Wi-Fi drops. Changing to a stable DNS can improve performance:

  1. Open Settings → Connections → Wi-Fi.

  2. Tap your network → Advanced → IP settings → Static.

  3. Enter DNS servers manually:

    • DNS 1: 8.8.8.8

    • DNS 2: 8.8.4.4

  4. Save and reconnect.

💡 Tip: Google DNS or Cloudflare DNS (1.1.1.1) are generally faster and reduce timeout errors.

8. How to Reduce Wi-Fi Interference

External interference can weaken signals. Consider these adjustments:

  • Place your router in a central, open location.

  • Avoid physical obstructions like walls, microwaves, or metal objects.

  • Limit the number of connected devices to reduce congestion.

  • Test your Samsung in different locations to identify weak signal zones.

✅ Small changes in placement and environment can significantly improve connectivity.

9. How to Renew Lease and Optimize Router Channels

Refreshing your DHCP lease and adjusting router channels can fix conflicts:

  1. Go to Settings → Connections → Wi-Fi → Tap network → Renew lease.

  2. On your router, change the Wi-Fi channel if neighboring networks are on the same frequency.

🔹 This reduces IP conflicts and improves overall stability, especially in dense areas with multiple networks.

10. Factory Reset and Hardware Checks

If all software fixes fail:

  1. Back up your Samsung phone via Samsung Cloud or Smart Switch.

  2. Perform a factory reset: Settings → General management → Reset → Factory data reset.

  3. Restore your backup afterward.

💡 Persistent Wi-Fi issues after a reset may indicate hardware problems, such as a damaged antenna. Visiting a Samsung Service Center is recommended for professional diagnostics.

✅ Summary: How to Keep Samsung Wi-Fi Stable

Frequent Wi-Fi disconnections on Samsung phones can stem from software glitches, network misconfigurations, router problems, battery optimization settings, or hardware issues. By following these steps:

  • Restart your phone and router

  • Forget and reconnect networks

  • Disable Smart Network Switch

  • Exclude critical apps from battery optimization

  • Reset network settings

  • Update software and firmware

  • Adjust DNS settings

  • Minimize interference

  • Renew DHCP leases

  • Consider a factory reset if needed

…you can restore reliable Wi-Fi connectivity and enjoy uninterrupted streaming, gaming, and work sessions.

Proper Wi-Fi management combined with smart phone settings ensures long-term stability and reduces frustration caused by frequent disconnections.

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