Some ZXDZ 01 units use an Bluetooth module. You can update the Bluetooth firmware (not OBD firmware):

One of the primary complaints with older versions was occasional system hangs or unexpected reboots. The new firmware addresses memory leak issues and optimizes background processes, ensuring a smoother user experience even under heavy loads. 2. Connectivity Improvements

chipset. Firmware for these units is typically released by third-party communities rather than a central manufacturer website. Latest Firmware Versions