Copy update.upt to the root directory of your microSD card (do not place it in any folders). Run Update:
Unlike mainstream smartphones that receive over-the-air (OTA) updates, finding the authentic HiFi Walker H2 firmware is a surprisingly archaeological experience. The official channels are fragmented. While the manufacturer (often associated with "HiBy Music" or "Xuelin iHiFi") provides links, many users turn to dedicated audio forums like Head-Fi or Reddit’s r/DigitalAudioPlayer. hifi walker h2 firmware download