To access these, you usually type a code into the stock Phone app dialer:
Some menus provide "Battery Cycle" counts which show true wear and tear. To access these, you usually type a code
: The General Test Mode (Standard for most Galaxy phones). *#0011# : Service Mode for network and Wi-Fi status. *#1234# : Displays current software and PDA versions. *#2222# : Shows hardware version. The Risks of "Secret" Menus To access these
Detailed signal strength and frequency band info. Version Info: Exact firmware and hardware revisions. Advanced Tweaks: Audio gain levels or USB settings. Common Codes for Smartphones To access these, you usually type a code
It is a built-in firmware interface hidden from the standard UI. It allows access to: