How to Fix Galaxy S25 Ultra That Will Not Turn On

Some Galaxy S25 Ultra users are experiencing software issues including freezes, crashes, boot loops, and unexpected behavior. These troubleshooting steps can resolve most software-related problems.

Fix #1: Force Restart

Most software glitches on the Galaxy S25 Ultra — freezes, crashes, boot loops, and unresponsive screens — can be resolved with a force restart.

1. Press and hold Volume Down + Power for about 10 seconds.
2. Release when the Samsung logo appears.

Fix #2: Boot into Safe Mode

If the phone keeps crashing or freezing, Safe Mode helps determine if a third-party app is causing the issue.

1. Hold the Power button until the power menu appears.
2. Long-press Power Off until the Safe Mode prompt appears.
3. Tap Safe Mode.

Fix #3: Wipe Cache Partition

Corrupted system cache from a recent update often causes instability.

1. Turn off the phone.
2. Press and hold Volume Up + Power until the Samsung logo appears.
3. Use Volume buttons to navigate to Wipe Cache Partition and press Power to select.
4. Confirm and reboot.

Fix #4: Check for Software Updates

1. Go to Settings > Software Update > Download and Install.

Fix #5: Reset App Preferences

This resets all default app selections, disabled apps, and notification restrictions without deleting app data.

1. Go to Settings > Apps.
2. Tap the three-dot menu and select Reset App Preferences.

Fix #6: Factory Reset

If the phone remains unstable, a factory reset is the definitive software fix.

1. Back up all data.
2. Go to Settings > General Management > Reset > Factory Data Reset.
3. Tap Reset and confirm.

Fix #7: Recovery Mode Reset

If the phone will not boot into the system, use Recovery Mode.

1. Turn off the phone.
2. Hold Volume Up + Power to enter Recovery Mode.
3. Select Wipe Data/Factory Reset.