Opens a hidden menu with Serial Number, Manufacture Date, Life Timer. Factory Reset Restores original factory settings (does not delete data). Full Format Erases all user data and restores default settings. Bluetooth Addr Displays the device's Bluetooth address. Clear Display *#67705646# Clears the operator logo on the screen. Detailed Feature Breakdown 1. The Secret Service Menu ( *#92702689#

This checks if your phone is network-locked. The display will show:

Nokia 225 Dual SIM , a staple of reliable feature phones, holds a variety of hidden diagnostic and functional codes that allow users to access deep system information, reset settings, or check for network locks. These secret codes can help troubleshoot issues, verify the manufacturing date, or manage SIM settings without navigating complex menus