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Troubleshoot issues related to Bluetooth and your Samsung M400

Last Updated: Nov 15, 2013

This article helps you troubleshoot Bluetooth issues on your Samsung M400.

You may have Bluetooth® issues if your Samsung M400™ is unable to:
  • Pair with a Bluetooth device
  • Connect to a Bluetooth device
  • Recognize a Bluetooth device

These steps help identify and resolve the underlying cause. After completing each step, test to see if the issue is fixed. If not, continue to the next step.

  1. Does the device you're pairing with support the same Bluetooth protocols as your Samsung M400?

    Refer to the Bluetooth device's user manual for compatibility.

    Your Samsung M400 is compatible with Bluetooth v1.0 with DUN, HFP, HSP, and PBAP.

    If the manual doesn't list any of these protocols, your Samsung M400 is unable to connect to that Bluetooth device.

  2. Is Bluetooth enabled on both devices?

    Bluetooth may be turned off on either the Samsung M400 or the other Bluetooth device. Be sure Bluetooth is enabled on both devices.

    Turn your Samsung M400 Bluetooth on.

  3. Is the Bluetooth device in range?

    The Bluetooth communication range for most devices, including your Samsung M400, is about 30 feet. Be sure your devices are in range.

  4. Perform a soft reset.

    A soft reset deletes any temporary files that may be causing the issue.

    1. Press and hold the Power key to turn your Samsung M400 off.
    2. Remove the battery. After 30 seconds, reinsert the battery.
    3. Press and hold the Power key to turn your Samsung M400 back on.
    4. Test your phone to see if the issue is resolved.

  5. Remove the pairing and re-pair the Bluetooth device.

    Removing the pairing, restarting your Samsung M400, and then re-pairing the Bluetooth device refreshes and updates your connection.

    Pair with a Bluetooth device.

Note: To optimize device performance, be sure your Samsung M400 is running the most recent device software. Check for software updates.

If you're still having issues, please contact Sprint Customer Care for more help.

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