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How to Restart a Samsung Phone in Safe Mode to Diagnose Problems

Start a Samsung Galaxy phone in Safe mode from the Power menu or during startup, then check whether the problem still occurs with third-party apps disabled.
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To restart a Samsung Galaxy phone in Safe mode, open its Power menu, touch and hold Power off, then tap Safe mode. If you cannot use the menu, power the phone off; turn it on and hold Volume down when the Samsung logo appears. Safe mode temporarily disables third-party apps, helping you check whether one may be causing a problem.

Start Safe mode from the Power menu

Use this method when the phone is responsive enough to open its Power menu. On many Galaxy devices, you can open it in either of these ways:

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  • Press and hold the Side and Volume down buttons together.
  • Open the Quick panel and tap its Power icon.
  1. In the Power menu, touch and hold Power off until the Safe mode option appears.
  2. Tap Safe mode and wait for the phone to restart.
  3. Check for the words Safe mode at the bottom of the screen.

On Galaxy devices with a regular Power button, Samsung also describes opening the Power menu by holding that button. Menu layout and button names can differ by model, carrier, and software version. See Samsung’s Safe mode instructions if the controls on your phone look different.

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Start Safe mode with the phone powered off

If opening the Power menu is difficult, use the button sequence during startup:

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  1. Turn the phone completely off.
  2. Turn it on. When the Samsung logo appears, press and hold Volume down.
  3. Keep holding the button until startup finishes, then check for the Safe mode label at the lower left.

If the label does not appear, Samsung advises repeating the steps. This startup method and the Power menu method lead to the same diagnostic mode.

Use Safe mode to narrow down the cause

Samsung says that “In Safe mode, your device won’t run any third-party apps.” The phone continues running core applications, so use it normally long enough to see whether the original freezing, crashing, lag, camera, audio, or network symptom returns. Samsung identifies these as examples of problems that downloaded apps may affect (Samsung app and power troubleshooting).

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If the problem stops

A recently downloaded app is a likely cause, though Safe mode does not identify a specific app by itself. Start with apps installed or updated around the time the problem began. Remove likely candidates one at a time, restarting and checking whether the symptom returns after each removal. This makes it easier to identify a change associated with the problem.

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If the problem continues

If the symptom still occurs while third-party apps are disabled, a downloaded app may not be responsible. Samsung’s boot-loop troubleshooting guidance says a problem that persists in Safe mode is likely hardware-related and recommends having the device inspected by Samsung service.

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Exit Safe mode

Restart the phone normally to leave Safe mode. On screens that offer it, you can also open the Safe mode notification and tap Turn off. The phone should boot normally, with third-party apps available again.

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Before considering a factory reset

Do not jump straight to a factory reset as the next diagnostic step. Samsung warns that a reset removes data and content, recommends it only as a last resort after other steps, and advises backing up personal data first. Follow Samsung’s troubleshooting guidance before deciding whether a reset is appropriate.

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