Notice Before Updating

About This Download

Benefits and Improvements

• Adds Quick Access support for Amazon Music
  Note: This feature may not be available depending on your country or region.

System Requirements

• An Android device (Ver. 9.0 or later) or an iPhone (iOS 15.0 or later)
• An active Internet connection
• The latest version of the Sony | Headphones Connect app (Ver. 10.4.1 or later) must be installed
• The headset must be connected to your Android device or iPhone

File Info

• Name: Firmware update 2.0.5 for ULT WEAR (WH-ULT900N)
• Version: 2.0.5
• Size: 2.31 MB (2 425 200 bytes)
• Release Date: 25-09-2024

Preparation

Check the Firmware Version

If the firmware version is 2.0.5, you do not need to perform the update. If you're not sure, it's easy to check which firmware version you have:

1. Launch the Sony | Headphones Connect app.
2. Connect your headset to the Sony | Headphones Connect app.
3. Press the three dots (Menu button) in the upper right corner.
   
   Note: The connected headset will appear on the screen.
4. Select the headset version shown in the Menu. This will only be shown when the headset is connected to the Sony | Headphones Connect app.
5. Confirm the firmware version.

Important Notice

• Do not charge the battery or turn off your headset while downloading updates, transferring data, or updating the firmware. Doing so may cause the headset to become unusable.
  
• Do not perform the update in a location where the Wi-Fi signal is inconsistent or congested, such as on a train or near a microwave, cordless phone, or any other devices that use the 2.4 GHz band frequency radio waves.
• Make sure both devices (Android/iPhone and the headset) are fully charged.
• Disconnect all other Bluetooth devices such as wearable devices or smart watches from your Android device/iPhone before starting the update.
• When updating the firmware after removing your headset, go to the Auto Power Off function of the Sony | Headphones Connect app, and select Do not turn off.
  • If you select Off when headphones are taken off, your headset will automatically turn off after approximately 15 minutes and the data transfer of the update file will be interrupted.
  • If that happens, the next time your headset turns on and Bluetooth is reconnected, the data transfer will resume. If you change the settings for this update, you can restore the settings after the update is completed.

Before You Upgrade

• Once updated, the firmware cannot be reverted to an earlier version.
• If you use an Android device, the update process will take approximately 40 minutes to complete.
• If you use an iPhone, the update process will take approximately 60 minutes to complete.
• Depending on the radio wave environment and your Android device or iPhone, the update process may take longer to complete.

Download & Install

To update the headset, follow the procedure below:

1. Download the data from the server to the Android device or iPhone.
2. Transfer the data from the Android device or iPhone to the headset.
3. Complete the update using the headset.

Step 1: Install the Update

1. Launch the Sony | Headphones Connect app.
2. Connect your headset to the Sony | Headphones Connect app.
   • If you have never connected your headset to the Sony | Headphones Connect app before, follow the on-screen instructions to set up a connection.
   • If you have connected to the Sony | Headphones Connect app before, select your headset from the available options.
3. The following screen will be shown when the connection has been established. If an update is applicable, the message The latest headset software is available will be displayed. Make sure the headset is connected.
   
   • Press More info. The Software Information screen will appear.
   • Verify that Version 2.0.5 is displayed and press OK.
   
4. Once the download starts, the screen will automatically move to the next one after the download is completed.
   Note: When the message Bluetooth Pairing Request is displayed, press Pair. The update will resume. (Only for iPhone)
5. 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 the firmware. Doing so may cause the headphones to become unusable. If a disconnection message is displayed, wait until the headphones automatically reconnect.
6. When the software update is completed, press OK.
   • If a Software update complete. message does not appear, check whether the firmware version has been upgraded using the Step 2: Check the update was successful section.
     
   • During the update, the headset will turn off automatically. It will automatically turn back on and reconnect via Bluetooth before the update is completed.

Step 2: Check the Update Was Successful

After the update, confirm the new version has been installed successfully by following the steps in the Check the Firmware Version section. If the firmware version shown is 2.0.5, the upgrade was successful.

Questions & Answers

An Update Error Message Appears.

1. Press OK.
2. Restart the headset (turn off, then turn on again).
3. After that, restart the Sony | Headphones Connect app and try the update again.

Even though the update failed during the process, check the firmware version to confirm. If the version shown is 2.0.5, the firmware update was successful. If not, try the update again. For details, check the firmware version from the Sony | Headphones Connect app settings or go to the Check the Firmware Version section on this page.