10.6 Configuring dynamic numbers
You can use up to 9 different sender numbers. The user can do this by dialling a prefix (#3x#) before the number to be called.
Note that the code #31# cannot be set, as it reserved for anonymous dialling out.
On most mobile devices, the #3X# codes are not supported. To dial out on a mobile device with a dynamic number, replace it with 13X
To configure dynamic numbers