The LG Audio Remote (or LG Wi-Fi Speaker) app used to support OTA updates, but LG has since deprecated this for legacy models like the NB4540. Many users report the app says “No update available” even when a USB update exists. Always use the USB method.

: If a flashable file is available for your region, download the ZIP package directly to your computer.

: If the update fails or the soundbar becomes unresponsive, you can perform a factory reset by holding the Volume Down Sound Effect

The easiest way to update the LG NB4540 is through the official smartphone application.

Fast activation • Secure service