: One of the most powerful codes. It opens a hidden menu with four key sections:
: Launches a comprehensive diagnostic suite to test the LCD, vibration motor, speakers, OTG, and Bluetooth. How to Use Secret Codes on TECNO Spark 20
: Displays signal strength, current network type, and allows you to run a Ping test. : One of the most powerful codes
These are safe for every user. They provide basic info about your Spark 20. and Bluetooth. : Displays signal strength