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The OPPO A83 Pro, a popular budget-friendly smartphone from the 2018 era, runs on ColorOS (based on Android). Like most Android devices, it supports a variety of USSD codes (often called "secret codes" or "engineering codes") that allow users to access hidden menus, test hardware functions, retrieve device information, and perform quick diagnostics.
The OPPO A83 Pro, a popular budget-friendly smartphone from the 2018 era, runs on ColorOS (based on Android). Like most Android devices, it supports a variety of USSD codes (often called "secret codes" or "engineering codes") that allow users to access hidden menus, test hardware functions, retrieve device information, and perform quick diagnostics.