9.2 Set or hide phone numbers
You have several phone numbers and would like one of these numbers to be signalled by default for outgoing calls?
Or you would like to make an anonymous call? Swyx Mobile gives you the option of hiding your phone number for external calls.
To define which of your phone numbers should be signalled by default
1 Next to your profile picture, select the default phone number that should be signaled for external calls.
2 Tap on Save.
*The selected number will then be signalled for every outgoing call, unless you actively select a different number for each call.
To hide your phone number
1 Expand the Caller ID field next to your profile picture.
2 Tap on Hidden.
3 Tap on Save.
*Your phone number will no longer be displayed to your call partner for external calls.
 
Your phone number is hidden for external calls until you deactivate the option again.