Each user can have multiple numbers to use for outgoing calls. If you need to switch your own phone number due to your work, you can use a prefix number or switch your phone number in MiiTel Phone.
How to change the outgoing caller ID by Prefix number
If you add a prefix number and an asterisk (*) to the outgoing caller ID, you can make a call using the phone number associated with the prefix number.
For example, if the prefix number is "002" and the outgoing caller ID is "0300000000", enter "002*0300000000" to make a call.
The phone number whose prefix number is registered as "002" will be displayed as the destination of the call.