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Troubleshoot when your Apple iPhone 4 slows, freezes, or turns off unexpectedly

Last Updated: Nov 15, 2013

This article helps troubleshoot your Apple iPhone 4 slowing, freezing, or turning off unexpectedly.

You may have performance issues if your Apple iPhone 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. Perform a soft reset.

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

    1. From the home screen, press and hold the Power key and Home key.
    2. Release the keys when the Apple logo appears.
    3. You Apple iPhone 4 restarts.
  2. Determine if your phone has low memory.

    1. From the home screen, tap Settings.
    2. Tap General.
    3. Tap Usage.
    4. If your phone has low memory, troubleshoot low memory issues.
  3. Close background applications.

    Some apps continue to run in the background after you exit them. Sprint recommends that you close background applications when you're not using them.

  4. Verify that your Apple iPhone 4 is running the most recent software.

    There may be a software update that improves battery life on your phone. Check for software updates.

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

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