If you're looking for a portable RK3128 Android 9.0 firmware, you can try the following sources:
Your stock remote works for power and volume, but not for menus. rk3128 android 90 firmware portable
If you are looking for the actual firmware rather than a narrative, here is the reality of the Legacy Support If you're looking for a portable RK3128 Android 9
Upgrading your portable device to Android 9.0 (Pie) offers several key advantages over older legacy versions: rk3128 android 90 firmware portable
If you're looking for a portable RK3128 Android 9.0 firmware, you can try the following sources:
Your stock remote works for power and volume, but not for menus.
If you are looking for the actual firmware rather than a narrative, here is the reality of the Legacy Support
Upgrading your portable device to Android 9.0 (Pie) offers several key advantages over older legacy versions: