A common complaint among users of older or un-updated RKPX3 devices is the occasional lag or freeze. The "extra quality" update actively tackles these issues.
RKpx3 Android Update: Unlocking Extra Quality and Performance for Your Device
Do not proceed without these items. A failed flash can lead to a "brick" (dead device). rkpx3 android update extra quality
What are you trying to fix (slowness, app crashes, audio issues)? How to: Update PX3 Vertical Screen Head units
Stock Android locks refresh rate to 60Hz. The custom update enables : A common complaint among users of older or
Standard RKPX3 builds often suffer from dropped Bluetooth connections and lagging EasyConnection links. Quality-optimized updates overhaul the Bluetooth stack and update the underlying architecture to support stable, low-latency wireless Apple CarPlay and Android Auto via external dongles or built-in emulators. Step-by-Step Installation Guide
Custom kernels handle the limited RAM (usually 1GB or 2GB) on PX3 devices much more efficiently, preventing background apps from closing abruptly. A failed flash can lead to a "brick" (dead device)
Given these risks, the first and most important step is to do everything you can to obtain the official firmware from your original seller. Comb through your email for your original purchase receipt, check the seller's store page, or contact them directly. The "extra quality" update starts with the correct official file.
If navigation is slow to find your location, use an app like GPS Status & Toolbox to clear and download fresh A-GPS data.