Search for “YG300 GPS firmware” in Telegram. Enthusiast groups often maintain pinned messages with the latest .hex or .bin files. Always ask for a screenshot of the working version before downloading.
can be difficult because it is a generic mini projector produced by multiple manufacturers. There is for this device. Where to Find Firmware
If your box says Lumos, Meer, or Apeman , go directly to their specific support sites. They host custom firmware versions tailored to their specific builds.