!!hot!! — Xhdata D-808 Firmware Update

Remove the battery cover. Look at the metal shielding behind the batteries. Near the top right corner (or bottom left, depending on the revision), you will see a small painted dot.

If you want, I can:

While you cannot install a new version of the software, many issues that feel like firmware glitches can be resolved through a hard reset: xhdata d-808 firmware update

Note: Some very recent 2024-2025 production models have a "Green Dot" or no dot but come with firmware 8832 pre-installed. These do not require user intervention. Remove the battery cover