If the device hangs after flashing, you may need to try an alternative ROM or use the SD Card Burn Tool method. H3Q44-V3.0 firmware image or the PhoenixSuite tool?
Before downloading anything, you must open the plastic casing of your MXQ Pro. Do not rely on the sticker on the bottom of the box. firmware tv box mxq pro 4k 5g placa h3q44-v3.0