This method requires a Windows PC and a (a cable with a standard USB plug on both ends).
The first boot after a fresh flash can take anywhere from while the device builds its Dalvik cache. Leave it entirely alone. If it takes longer than 15 minutes, re-flash using Method 1. Wi-Fi or Bluetooth Does Not Turn On mxq s805 firmware 51 download link
This usually indicates a bad USB cable, using the wrong USB port on your PC (use USB 2.0 ports rather than blue USB 3.0 ports), or trying to flash a firmware image that is incompatible with your specific hardware revision. This method requires a Windows PC and a
Release the button when the Android recovery screen or an automated installation progress bar appears. The system will wipe the old operating system and install Android 5.1. Crucial Troubleshooting Tips If it takes longer than 15 minutes, re-flash using Method 1
Official stock firmware updates for this older device are rare. Most Android 5.1 packages are custom ROMs developed by the community.
Unzip your downloaded firmware files. You should typically see files like factory_update_param.aml , recovery.img , and a .zip or .img firmware file. Enter Recovery Mode: Insert the SD card/USB into the box. Unplug the power.