Finding reliable 5.1.1 firmware for this specific chipset often requires looking for ported ROMs originally built for similar devices like the or Minix Neo X6 .
⚠️ There is no official "MXQ" brand; it's a generic Chinese reference design. Firmware from one MXQ S805 may not work on another. mxq amlogic s805 android 511 lollipop download install