: On some devices, like the Pumpkin car stereos , users reported that while the UI was faster, steering wheel controls (SWC) would stop working.
Many users report that the Android 5.1 UI feels faster and more reliable compared to the original KitKat (4.4) versions. Hardware Bottlenecks: Because the rk3188 android 5.1 firmware
One of the most popular custom builds for car head units. It often replaces heavy Google services with for better performance on older hardware. Oma7144 / CrewRKTablets: : On some devices, like the Pumpkin car
Reviews from community forums and tech enthusiasts indicate a mixed experience when upgrading to 5.1: : On some devices