How to Fix Galaxy S25 Wi-Fi Keeps Disconnecting After Update

If your Galaxy S25 keeps dropping Wi-Fi after a software update, the problem is usually caused by corrupted network settings, router compatibility issues, aggressive battery optimization, or a bad handoff between saved wireless profiles and the new firmware.

Use these proven fixes for Galaxy S25 Wi-Fi keeps disconnecting after update.

Fix #1: Restart the phone and your router

Restart both devices first. A simple reboot can clear a bad DHCP lease, stuck wireless radio state, or temporary update-related network bug.

Fix #2: Forget the Wi-Fi network and reconnect

Go to Settings > Connections > Wi-Fi, tap the affected network, choose Forget, then reconnect by entering the password again. This rebuilds the saved profile from scratch.

Fix #3: Disable Intelligent Wi-Fi switching temporarily

If the phone keeps jumping between networks or dropping weak signals, temporarily disable features that switch networks automatically, then test the connection again.

Fix #4: Reset Wi-Fi and Bluetooth settings

Open Settings > General management > Reset > Reset Wi-Fi and Bluetooth settings. This removes broken wireless settings left behind after the update.

Fix #5: Check router band steering or Wi-Fi 6 settings

If the disconnects happen only on one router, split the 2.4 GHz and 5 GHz bands temporarily or disable advanced router features for testing. Some post-update issues come from router compatibility rather than the phone alone.

Fix #6: Install router firmware and phone updates

Update the router firmware and check for a newer Samsung patch. Compatibility fixes often arrive quickly after rollout complaints begin.

Fix #7: Wipe the cache partition

Boot into Recovery Mode and use Wipe cache partition, then reboot. This can clear corrupted temporary system files affecting Wi-Fi stability.

Related Galaxy S25 fixes

If the Galaxy S25 still disconnects from every Wi-Fi network after these steps, capture the exact behavior and router model before contacting Samsung support.