Möglicherweise funktionieren ein oder mehrere Codes nicht, da die Implementierung der Codes auf der Firmware und Softwareversion beruht
To enter a Service Code - enter the requested code and press OFF-HOOK key.
*99950* - Delete phone book, speed dial list, message templates and all subscriptions
*99951* - Delete Phonebook and speed dial list
*99954* - Delete all subscriptions
*99968* - Enable B-answer when placed in charger
*99977* - Vibrator, buzzer and display test
*99988* - Show handset up-time
*99989* - Test display for measuring radio performance/coverage