The keyword includes the word for a reason. The MXQ Pro 4K 5G with the H3Q44V30 board has a critical design flaw:

motherboard (placa) is a specialized hardware revision that often requires specific firmware to resolve issues like boot loops or system instability. Because these boxes are often generic ("clones"), using the incorrect ROM can easily brick the device. Critical Pre-Installation Steps

While some listings claim Android 11 or 12, many of these boards actually run on Android 7.1.2 or 10.1 . How to Install Firmware (Flashing Guide) board, there are two primary methods for updating: Method 1: USB Flash via PC (Recommended)

Insert a toothpick or matchstick into the to press and hold the hidden reset button .