PREPARATION
TOOLS
1. Nexus Root Toolkit.
2. Open Recovery by Team Win Recovery (TWRP) for grouper image.
MIRACAST FLASH ZIP
1. Download the modified flash zip file.
Disclaimer:
I accept no liability for the consequences of any actions taken on the basis of the information provided.
WARNING: Try at your own risk! I accept no liability for any damage caused by installations to your devices.
How To:
1. Copy miracast flash zip file to your device storage.
2. Install zip file using TWRP recovery with skip verification.
3. You may refer on the sources below.