Tip

Cell phone hidden codes

7/28/2026

Cell phone hidden codes—known as MMI or USSD codes—let you access engineering menus, check device info, and test hardware. Key universal codes include *#06# for the IMEI, *#67# for call forwarding, and *#43# for call waiting.Universal Codes (Android and iOS)*#06#: Shows your phone's unique IMEI number.*#67#: Checks where calls go when your line is busy.*#43#: Checks if call waiting is active.*#31#: Toggles caller ID settings.Android-Specific Codes*#*#4636#*#*: Opens a testing menu for battery, Wi-Fi, and usage stats.*#0*#: Opens the hardware test menu on most Samsung Galaxy phones.*#1234#: Displays software and firmware versions on Samsung devices.iPhone-Specific Codes*3001#12345#*: Opens the Field Test Mode dashboard for signal and tower metrics