How to Fix Galaxy S25 WiFi Keeps Disconnecting After Update

Galaxy S25 WiFi Keeps Disconnecting After Update is usually caused by a bad network profile, router compatibility issue, corrupted cached system data, or an update bug that changed wireless settings.

For related help, also see How to Fix Galaxy S25 Mobile Data Not Working After Update, How to Fix Galaxy S25 Notifications Not Working After Update, How to Fix Galaxy S25 Black Screen After Update, and the Galaxy S25 hub.

Method 1: Restart the router and the Galaxy S25

A fresh reboot clears temporary connection errors on both sides of the link.

1. Turn Wi-Fi off on the phone for 10 seconds.
2. Restart the router and wait until it fully comes back online.
3. Restart the Galaxy S25 and reconnect to the same network.

Method 2: Forget the Wi-Fi network and reconnect

An update can corrupt the saved network profile and cause repeated disconnects.

1. Open Settings > Connections > Wi-Fi.
2. Tap the affected network and choose Forget.
3. Reconnect and enter the password again.

Method 3: Toggle Intelligent Wi-Fi features

Automatic switching features sometimes become too aggressive after an update.

1. Open Settings > Connections > Wi-Fi > Intelligent Wi-Fi.
2. Temporarily turn off options that auto-switch to mobile data or weak networks.
3. Test the connection for several minutes.

Method 4: Reset network settings

This removes broken Wi-Fi, Bluetooth, and mobile network settings without deleting personal files.

1. Go to Settings > General management > Reset.
2. Tap Reset network settings.
3. Reconnect to Wi-Fi and test again.

Method 5: Wipe the cache partition

Cached system files left over from the update can interfere with wireless stability.

1. Power off the phone.
2. Boot into recovery and choose Wipe cache partition.
3. Restart the phone and retest Wi-Fi.

Method 6: Check router band and security settings

Some routers disconnect newer phones if band steering or security mode is misconfigured.

1. Test both the 2.4GHz and 5GHz bands separately if available.
2. Use WPA2/WPA3 mixed mode or the most stable supported security setting.
3. Install any pending router firmware update.

Method 7: Install the newest patch

Samsung often follows up with a quick bug-fix release for wireless issues reported after a major update.

1. Open Settings > Software update.
2. Tap Download and install.
3. Install any newer build and test Wi-Fi again.

If the problem continues after all of the steps above, visit the main Galaxy S25 page for more troubleshooting guides.