eMCP (Embedded Multi-Chip Package) combines eMMC storage and DDR memory into a single chip. The denotes a specific PCB revision. This is crucial because firmware for an older V2.1 or a non-eMCP board will not work on a V3.1 eMCP board. Flashing the wrong firmware can corrupt the partitioning table or disable the Wi-Fi chip (usually an AP6212, AP6330, or SV6256P).
Remember: Patience is key. If the flash fails, re-enter Mask ROM mode and try again with a different USB port (preferably USB 2.0 on your PC). Once flashed successfully, your MXQ RK3229 eMCP V3.1 should deliver stable Android performance for streaming and light gaming. Mxq Rk3229 Emcp V3.1 Firmware