The most reliable method is to contact the seller or distributor from whom you purchased the FA4. They can provide you with the correct firmware file and any specific instructions, especially for the Hong Kong version.
F.audio FA4 (also known as the F.audio Z16 Pro ) is a high-resolution digital audio player (DAP) that often requires manual firmware updates to fix UI bugs, improve library handling, or restore Bluetooth functionality Prerequisites & Preparation Battery Life : Ensure your has at least 50% battery
| Version | Release Date (Approx.) | Reported Improvements / Notes | | :--- | :--- | :--- | | FA4P_V7.80 | 2022-10-10 | Update for XMOS_XU216 to support latest XMOS drivers; availability may vary by region. | | (No Version Known) | Jan 2023 | Update that increased Bluetooth volume output significantly. | | (No Version Known) | Before 2024 | User reports of a "9.2" version that wasn't native to FA4 but worked without issues. |