The term "codez' is often associated with USSD codes or hidden menus on phones.

(Android) are used to test physical components such as the LCD screen, vibration motor, and sensors to ensure they are functioning properly. System Information : Codes such as to display the (International Mobile Equipment Identity) or *#*#4636#*#* to view detailed battery and network statistics. Call Management : Codes to check or toggle network-level settings like Call Forwarding Call Waiting Calling Line Presentation Performance Optimization : Tools for clearing system logs or "dumpstate" (e.g.,