If your Samsung Galaxy S25 Ultra is having trouble connecting to a Wi-Fi network, the issue could be related to software glitches, incorrect settings, or router problems. Here are several troubleshooting methods to fix the issue.

Solutions

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1. Restart Your Phone and Router

A simple restart can resolve temporary connectivity issues.

Press and hold the Power button on your phone.
Tap Restart and wait for the device to reboot.
Turn off your Wi-Fi router, wait for 30 seconds, and turn it back on.
Try reconnecting your phone to Wi-Fi.

2. Toggle Airplane Mode

Turning Airplane Mode on and off can reset network connections.

Swipe down from the top of the screen to open Quick Settings.
Tap Airplane Mode to enable it.
Wait for 30 seconds, then tap it again to disable it.
Try connecting to Wi-Fi again.

3. Forget and Reconnect to the Wi-Fi Network

Reconnecting to the network can fix authentication and connection issues.

Open Settings > Connections > Wi-Fi.
Tap the gear icon next to your Wi-Fi network.
Select Forget this network.
Reconnect by selecting the network and entering the password.

4. Check for Software Updates

A software bug might be causing Wi-Fi issues, and an update could fix it.

Go to Settings > Software Update.
Tap Download and Install.
If an update is available, install it and restart your phone.

5. Reset Network Settings

Resetting network settings will clear all Wi-Fi, Bluetooth, and mobile data settings.

Go to Settings > General Management > Reset.
Tap Reset Network Settings.
Confirm by tapping Reset Settings.
Reconnect to your Wi-Fi network.

6. Check Router and Internet Connection

Your router may be experiencing issues that prevent a stable connection.

Try connecting another device (like a laptop) to the Wi-Fi network.
If other devices can’t connect, restart the router and check for firmware updates.
Move closer to the router to ensure a strong signal.
If the issue persists, contact your internet service provider.

7. Turn Off Wi-Fi Power Saving Mode

Wi-Fi power-saving settings may interfere with the connection.

Go to Settings > Connections > Wi-Fi.
Tap the gear icon next to your Wi-Fi network.
Select Advanced Settings.
Disable Wi-Fi Power Saving Mode.

8. Check for Conflicting Apps

Some apps may interfere with Wi-Fi connections.

Boot your phone into Safe Mode by holding the Power button, then long-pressing Power Off, and selecting Safe Mode.
Try connecting to Wi-Fi.
If the issue is resolved, uninstall recently installed apps that may be causing interference.

9. Change DNS Settings

Switching to a public DNS like Google’s can improve connectivity.

Go to Settings > Connections > Wi-Fi.
Tap the gear icon next to your Wi-Fi network.
Select IP Settings and change it to Static.
Under DNS 1, enter 8.8.8.8 and under DNS 2, enter 8.8.4.4.
Save changes and reconnect to Wi-Fi.

10. Disable MAC Address Randomization

Some networks may block randomized MAC addresses, preventing connection.

Open Settings > Connections > Wi-Fi.
Tap the gear icon next to your network.
Select MAC Address Type and choose Phone MAC.
Reconnect to the Wi-Fi network.

11. Perform a Soft Reset

A soft reset clears minor system errors that could affect Wi-Fi.

Press and hold the Volume Down and Power button for about 10 seconds.
Release the buttons when the Samsung logo appears.
Try connecting to Wi-Fi again.

12. Contact Samsung Support

If none of the solutions work, professional assistance may be required.

Visit the official Samsung Support website.
Schedule an appointment at an authorized Samsung service center.
Explain the issue and follow any troubleshooting steps provided by support.

These troubleshooting steps should help resolve Wi-Fi connectivity issues on your Samsung Galaxy S25 Ultra. If the problem continues, professional repair or further diagnostics may be needed.