On your Oppo A57, go to Settings > About Phone > Version and tap Version Number seven times until it says "You are now a developer."

This process completely wipes all internal storage. Back up your photos, contacts, and documents.

In the "Scatter-loading file" field, click choose and navigate to your extracted Global Firmware folder. Select the text file ending in Android scatter (e.g., MT6765_Android_scatter.txt ).

Users generally seek the global conversion to solve specific regional limitations found in Chinese models:

Launch the on your PC and click "Bypass".