YT9217B Firmware Update: How to Install Android 10 (and Avoid Bricking Your Unit) The YT9217B is one of the most popular universal Android head units, often sold under brand names like “Junsun,” “Xtrons,” or “Eonon.” While many units ship with a fake Android version (e.g., claiming Android 10 on a 9 or 8 core), a true Android 10 firmware does exist for the YT9217B—provided you have the correct hardware revision. Warning: Flashing the wrong firmware will brick your unit. Proceed only after verifying your exact specifications. Step 1: Identify Your Current Firmware & MCU Do not skip this. The YT9217B uses different screen resolutions (1024x600 vs 800x480) and MCU versions (usually starting with 8227L ).
Go to Settings → System → About Device .
Look for:
MCU Version: Should begin with 8227L or YT9217B . Build Number / System Version: Note the full string. Screen DPI/resolution (usually 1024x600 for this model). yt9217b firmware update android 10
Take a photo of this screen.
Step 2: Source the Correct Android 10 Firmware Do not download from random file-sharing sites. Safe sources:
4pda.ru forum (use Google Translate, YT9217B thread). XDA Developers (Android Auto subforum). Direct from your seller (if you have a good relationship). YT9217B Firmware Update: How to Install Android 10
Firmware naming convention example: YT9217B_00002_V004_20210422_1024x600_Android10.zip
00002 = hardware revision V004 = MCU version 20210422 = date (YYYYMMDD) 1024x600 = resolution Android10 = claimed OS
Crucial note: Many “Android 10” updates for YT9217B are still using a Linux kernel 3.18 or 4.4. They will look like Android 10 (UI, gestures, dark mode) but are not AOSP 10. If you want true Treble support, seek builds with kernel 4.9+. Step 1: Identify Your Current Firmware & MCU
Step 3: Prepare the USB Drive
Use a USB 2.0 drive , 4GB–16GB, formatted as FAT32 (not exFAT/NTFS).