For the MXQ Pro 4K (RK3229) with the (or similar R329Q V3.x) motherboard, finding the "better" firmware usually means moving away from the unstable stock Android builds toward more lightweight, optimized community alternatives. Recommended Firmware Options LibreELEC (Kodi-focused):
Firmware for this specific board (v3.1) is critical because installing a version intended for a different board revision (like v2.0 or v4.0) can lead to a "red light" brick or non-functional Wi-Fi/Bluetooth.
You have the better firmware. Now let's optimize it.
Often considered the "best" for media playback because it replaces the heavy Android OS with a lightweight Linux system dedicated entirely to Kodi. This typically resolves the freezing and lag common on these budget boxes. Custom Android 7.1/9.0 ROMs: