Symptoms
- Firmware update progress bar stalls or fails repeatedly
- App shows an error message during the update
- Update seems to complete but version number doesn't change
- Headphones disconnect midway through an update attempt
Likely causes
- CommonHeadphones disconnecting from Bluetooth during the update processFirmware updates require a stable, continuous connection, and any drop can interrupt the process.
- CommonLow battery on the headphones during the update attemptMany devices block or fail firmware updates below a certain battery threshold as a safety measure.
- PossibleOutdated companion app versionAn old app version may have bugs in its update delivery mechanism.
- PossibleWeak WiFi/cellular connection on the phone during downloadThe firmware file itself needs to download to the phone before transferring to the headphones.
- Less commonServer-side issue with the manufacturer's update distributionTemporary outages on the manufacturer's end can affect many users' update attempts.
What to do
- Charge the headphones to at least 50–60% before attempting the update.
- Keep the headphones close to the phone and avoid using them (like taking calls) during the update process.
- Update the companion app itself to the latest version from the app store first.
- Ensure your phone has a strong WiFi or cellular connection during the update download.
- Close and reopen the companion app, then retry the firmware update from scratch.
- Restart both the phone and the headphones (via a factory reset if needed) before trying again.
- Check the manufacturer's website or social media for any reported server issues affecting updates.
When to call a pro
If the update repeatedly fails across multiple attempts with good battery and connection, contact the manufacturer's support, since a failed update can occasionally require a factory recovery tool.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.