Fix Galaxy S25 keeps disconnecting from Wi-Fi

If your Galaxy S25 keeps dropping Wi-Fi, the problem is usually one of three things: unstable router handoff, aggressive Wi-Fi switching settings, or corrupted network data on the phone. Work through the fixes below in order, from quickest to deepest.

Method 1: Restart your phone and router

This clears temporary IP and DHCP conflicts that often cause random disconnects.

Restart your Galaxy S25.
Unplug your router and modem for 30 seconds, then power them back on.
After internet is fully back, reconnect your phone and test for at least 5 minutes.

Method 2: Forget and reconnect to your Wi-Fi network

Rebuilding the saved network profile can fix bad authentication or stale security keys.

Go to Settings > Connections > Wi-Fi.
Tap the gear icon next to your network, then tap Forget.
Reconnect to the same network and enter the password again carefully.

Method 3: Disable Wi-Fi auto-switching features

On some networks, automatic switching can make the phone jump off Wi-Fi too quickly.

Open Settings > Connections > Wi-Fi.
Open Wi-Fi advanced/intelligent settings.
Turn off options like Switch to mobile data or similar auto network switching features.
Test again while staying in one location.

Method 4: Test 2.4 GHz vs 5 GHz (or separate SSIDs)

5 GHz is faster but usually less stable over distance and through walls.

If your router combines bands, create separate 2.4 GHz and 5 GHz names temporarily.
Connect the Galaxy S25 to 2.4 GHz and check stability.
If disconnects stop, keep 2.4 GHz for range-heavy areas or optimize your 5 GHz channel placement.

Method 5: Update phone software and router firmware

Wi-Fi stability fixes are often delivered through firmware updates.

On phone: Settings > Software update > Download and install.
On router: install the latest firmware from your router admin page or app.
Restart both devices after updates.

Method 6: Reset network settings

Use this if the issue continues across multiple networks.

Go to Settings > General management > Reset > Reset Wi-Fi and Bluetooth settings.
Confirm reset.
Reconnect to Wi-Fi and test again.

Method 7: Check for app conflict in Safe Mode

If Wi-Fi is stable in Safe Mode, a third-party app is likely interfering.

Press and hold the power button menu.
Touch and hold Power off, then tap Safe mode.
Test Wi-Fi for several minutes.
If stable, uninstall recently added network, VPN, or battery-optimizer apps.

When to contact Samsung or your ISP

Disconnects happen on every Wi-Fi network even after network reset.
Only your home network has issues while mobile hotspot works fine (likely router/ISP side).
The phone shows weak Wi-Fi signal at close range compared with other devices.