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Troubleshoot when your Lumia 635 slows, freezes, or turns off unexpectedly

Last Updated: Aug 03, 2016

This article helps troubleshoot your Lumia 635 slowing,freezing, or turning off unexpectedly.

You may have performance issues if your Lumia 635:

  • 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. Remove your SD card.

    1. Turn your phone off.
    2. Remove the battery.
    3. Remove the SD card.
    4. Reinsert the battery.
    5. Turn your phone back on.
  2. Determine if your phone has low memory.

    1. Swipe down from the top of the screen to open the action center.
    2. Tap ALL SETTINGS.
    3. Scroll to and tap storage sense.
    4. Refer to the phone section to determine if your phone has low memory.
    5. If your phone has low memory, troubleshoot low memory issues.
  3. Verify that your Lumia 635 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 the Sprint Community pages or make an appointment at a convenient Sprint Repair center.

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