The inside (e.g., AP6210 or RTL8188), as the wrong firmware will break your internet?
Removal of unnecessary Chinese or factory apps to free up internal storage and CPU cycles.
If your RK3188 device is currently sluggish on Android 4.2 or 4.4, moving to a refined 5.1 firmware is the single best way to maintain its utility as a media center or light emulation station. By stripping away factory limitations, these "better" builds unlock the true potential of the quad-core silicon.
Some "better" firmwares include kernel tweaks to boost the CPU/GPU clock speeds slightly, reducing lag in high-definition video playback.
The RK3188 chipset was a powerhouse in the early days of Android TV boxes and tablets, and while it is aging, upgrading to a optimized Android 5.1 Lollipop firmware can significantly breathe new life into these devices. Standard factory ROMs for the RK3188 often suffer from bloatware and poor memory management, making custom or "better" refined firmware essential for modern usability. Why Android 5.1 is the Sweet Spot for RK3188