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Troubleshoot when your Samsung Galaxy S 4 slows, freezes, or turns off unexpectedly

Last Updated: Nov 19, 2014

This article helps troubleshoot your Samsung Galaxy S 4 slowing, freezing, or turning off unexpectedly.

You may have performance issues if your Samsung Galaxy S® 4:

  • Performs slowly
  • Freezes
  • Turns off or unexpectedly restarts
  • Displays error messages
  • Is unable to install or update applications

Try each of these steps to see if it helps improve your phone's performance.

  1. Safely remove your SD card.

    1. From the home screen, tap the Menu key.
    2. Tap Settings.
    3. Scroll to and tap Storage.
    4. Scroll to and tap Unmount SD card.
    5. Tap OK.
    6. Remove the SD card.
  2. Perform a soft reset.

    A soft reset restarts your phone and does not erase any of your content or data.

    1. Turn your phone off.
    2. Remove the battery. After 30 seconds, reinsert the battery.
    3. Turn your phone back on.
  3. Use Sprint Zone to determine if your phone has low memory.

    1. Access Sprint Zone.
    2. Swipe from Right to Left to open Device Diagnostics.
    3. Tap Power Usage.
      • Overview: Displays your current power usage level and power mode.
      • Power Usage Details: Shows your power usage over time and which features use your battery the most.
        • Battery Usage: Shows battery history and the power usage of each app.
        • Current Power Settings: Shows settings that can affect battery life. Tap an item to change the setting.
        • Select Power Mode: Helps change settings to extend battery life.
      • Learn More: Provides more information on battery life.
  4. Clear the application cache.

    • Clear the application cache on your applications to free up space and improve performance.
    • Be sure you clear only the application cache and not the application data.
    • When you clear the application data, it removes your personal settings and info such as login information and high scores.
    • Clearing the application cache doesn't remove your personal settings or information.

    1. In Sprint Zone, swipe from Right to Left to open Device Diagnostics.
    2. Tap Power Usage.
    3. Tap Battery Usage.
    4. Tap an application.
    5. Tap App info
    6. Tap Clear cache.
  5. Close or uninstall applications.

    • Some apps run in the background when you are not using them.
    • Also, some apps consume more energy than others.
    • Some apps come pre-loaded on your phone and you can't uninstall them.

    1. From Device Diagnostics, tap Power Usage.
    2. Tap Battery Usage.
    3. Tap the application you want to close or uninstall.
      • Close (turn off) an application: Tap Force stop.
      • Uninstall (remove from phone) an application: Tap App info, Uninstall, and then OK.
  6. Verify that your Samsung Galaxy S 4 is running the most recent software.

    1. From Device Diagnostics, tap System Updates.
    2. Tap Device Software.
    3. Tap Check now.
      • If an update is available, follow the prompts to install.

If you're still having issues, try our community pages for the Samsung Galaxy S 4 or make an appointment at a convenient Sprint Repair center.

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