Never mix firmware from a different device. The parameter file and loader are hardware-specific. Using an RK3026 firmware from a 7-inch tablet on an 8-inch tablet can ruin the display driver or touchscreen.
Many budget and kid-focused tablets utilized this specific chipset/firmware combination: Rockchip Rk3026 4.4.2 Firmware
Disconnect USB → device reboots automatically. Never mix firmware from a different device
Mali-400 MP2, supporting 1080p video decoding and encoding. supporting 1080p video decoding and encoding.