Applicable Models

This information is for the following models:

  • WF-1000X
  • WH-CH700N

IMPORTANT: This file is only for use with the models identified. Not all models are sold in all countries.

About this download

Benefits and improvements from the latest update

  • Adds support for Amazon Alexa
    Note:
    In order to use Amazon Alexa with this product, you will need version 5.0.0 (or later) of the "Sony | Headphones Connect" application.

Previous Benefits and Improvements

WF-1000X

  • Optimises the headphones for Google Assistant
  • Pre-update for supporting Google Assistant
  • Other function improvements
  • Improves connection stability and reduces sound skipping
  • WF-1000X no longer turns off automatically when you change the "Sound Quality Mode" using the "Sony | Headphones Connect" application on iOS devices

WH-CH700N

  • Optimises the headphones for Google Assistant

Note: Google and Android are trademarks of Google LLC.

System Requirements

  • An Android device (V5.0 or later) or an iOS device (iOS 11.0 or later)
  • An active Internet connection
  • The latest version of the "Sony | Headphones Connect (v5.0.0 or higher)" application must be installed.
  • The headphones must be connected to your Android or iOS device

File Info

File Name

  • Firmware update 4.2.0 for WF-1000X / WH-CH700N

File Version

  • Version 4.2.0

Release Date

  • 16-04-2019

Preparation

Check the firmware version

If the firmware of your WF-1000X / WH-CH700N is version "4.2.0" or above, you do not need to perform the update.
If you're not sure, it's easy to check which version of firmware you have:

  1. Launch the "Sony | Headphones Connect" application.
  2. Connect your WF-1000X / WH-CH700N to the "Sony | Headphones Connect" application.
  3. Tap the three dots (menu button) in the upper right corner.
  4. Select the Version of your device shown in the Menu. This item is shown only when the device is connected.
  5. Confirm the WF-1000X / WH-CH700N firmware version.

Important notice

DO NOT "insert the main unit into the battery charger" or "Power off" while downloading/transferring data/updating, otherwise the headphones may become unusable.

DO NOT perform the update in a location where the Wi-Fi signal is inconsistent, such as:
- on a train/in a place where Wi-Fi signals become congested
- near a microwave, cordless phone or any other devices that use the 2.4 GHz band frequency radio waves

Make sure both devices (Android/iOS device and WF-1000X / WH-CH700N) are fully charged.

Disconnect all other Bluetooth devices such as wearable devices or smart watches from your Android/iOS device before starting the update.

Before you upgrade

  • Once updated, the firmware cannot be reverted to an earlier version.
  • WF-1000X
    For Android devices, the update process will take approximately 60 minutes to complete. (The file size is about 2.2 MB)
    For iOS devices, make sure to turn off the "Google Assistant" function prior to the update. The update process will take approximately 60 minutes to complete. (The file size is about 2.2 MB)
  • WH-CH700N
    For Android devices, the update process will take approximately 20 minutes to complete. (The file size is about 3.2 MB)
    For iOS devices, the update process will take approximately 20 minutes to complete. (The file size is about 3.2 MB)
  • Depending on the radio wave environment and your Android/iOS device, it may take longer to complete.
  • To update these headphones, follow the procedure below:
    • Download data from the server to the iOS device or the Android device.
    • Transfer data from the iOS device or the Android device to the headphones.
    • Execute update with the headphones.

To update these headphones, follow the procedure below:
  • Download data from the server to the iOS device or the Android device.
  • Transfer data from the iOS device or the Android device to the headphones.
  • Execute update with the headphones.

Step 1: Install the update

  1. Launch the "Sony | Headphones Connect" application.
  2. Connect your WF-1000X / WH-CH700N to the "Sony | Headphones Connect" application.
    • If you have never connected to the "Sony | Headphones Connect" application before, follow the instructions on the screen to connect the headphones to your Android device.
    • If you have connected to the "Sony | Headphones Connect" application before, select your headphones.
  3. The following screen will be shown when the connection has been established.
  4. If an update is applicable, "Headphone update available" will be displayed and you can press "More Info".
    Make sure that the right and left headphones are connected to each other. To confirm the connection, please press a button on the right-hand side and check that the blue light flashes every 5 seconds. If there is no flash or the flash appears every 1 second, please put the product into the case and try again from the beginning.
  5. Verify that "Version 4.2.0" is displayed and press "OK" to start the update.
  6. Once the download starts, it will automatically move to the next screen after the download is completed.
    NOTE:
    When the message [Bluetooth Pairing Request] is displayed, press "Pair". The update will resume. (Only for iOS devices.)
  7. The transfer starts. It will automatically move to the next screen after the download has been completed.
  8. Once the transfer starts, it will automatically move to the next screen after the transfer has been completed. This will take approximately one minute.
    NOTE:
    Do not charge the battery or turn off your headphones while downloading updates, transferring data or updating, otherwise the headphones may become unusable.
    If a disconnection message is displayed, wait until it automatically reconnects.
  9. When the software update is completed, press "OK".
    If the screen is not displayed, check whether the version has been upgraded in the following step.

Step 2: Check the update was successful

  • WF-1000X
    After the update, store the headphones into the battery charger and then remove the headphones from the battery charger, and confirm that the new version has been successfully installed by following the steps in the [Check the firmware version] section.
  • WH-CH700N
    After the update, confirm that the new version has been installed successfully by following the steps in the [Check the firmware version] section.

If the firmware version shown is "4.2.0", the upgrade was successful.

Questions & Answers

An update error message appears.

  1. Press "OK".
  2. Restart (turn the power off then on) the WF-1000X / WH-CH700N.
  3. After that, restart "Sony | Headphones Connect" and update again

Even though the update failed during the process, check the firmware version. If the Version is shown as 4.2.0, the firmware update was successful. If not, try the firmware update again. You can check the Version from the setting in the "Sony | Headphones Connect" application. To find out how to check the version, go to the "Check the firmware version" on this page.

You may find some related information on the following page.
Sound cuts out in the right unit of the WF-1000X earphones