Many of the functions that a smartphone has are not accessible from the conventional settings menu or by running applications. This is how the manufacturers believe it is convenient and they hide it behind alphanumeric codes since this prevents involuntary manipulations that could affect the performance of the equipment. It is nothing less than the functions intended for the maintenance of the equipment that include performance tests and diagnostic tests that are not easily interpreted by a common user.
However, there is a hardware test on Redmi phones suitable for users of all levels as it provides data on the status of commonly used components and sensors and with which anyone who owns a smartphone is familiar. For example, the battery, the Bluetooth antenna, the GPS sensor, the Wi-Fi antenna, the FM antenna, the accelerometer, the condition of the SIM card and microSD card slots, among others. It even has an option to test the operation of the phone charger.
How to unlock hardware test on your Redmi phone
This is a very simple procedure.
Open the Phone application, that is, the one you use to make calls. Then, enter the sequence ##6484##
This will open the diagnostic menu of the main hardware components and sensors of your Redmi phone. Select the options one by one and take note of the results in case you want to share them with other people.