USSD codes, which are frequently referred to as 'secret codes' are codes that are used to unlock hidden functions in your Android smartphone.
You must enter the Android security code directly into the dialer in order to run it. If the code is correctly entered (or put), a response will be given immediately.
Here are what basic things you need to look up to in order to ensure the best possible security for your Android Phones.
Wipe your device and reinstall Firmware: An efficient Android security code that you may use to swiftly erase all data from your device is *2767*3855#, and it goes a step further by reinstalling the firmware.
Run a Reset Factory: You can remove all personal data and any applications from your device by entering the code *#*#7780#*#*. Your device will then be restored to its factory settings.
General Test Mode Activation: If your Android phone is not working properly, enter the code *#0*# on your Android device.
This will show you the general test mode to test all different features and find out where and what is the actual problem you are facing.
Over to that, you have to be extra cautious while dealing with any unknown links on your phone, failing to which might lead you to land in extreme trouble.
Keep erasing unwanted files from your phone from getting overburdened and ensure that you take all possible precautions while installing any additional files in your Android system.