Ability to hide caller id on outgoing calls
ios/android have a setting to allow you to hide your Caller ID (phone number) on outgoing calls (if the carrier allows it).
As far as I know this is done by prefixing the recipients phone number when calling with another number of USSD code.
It could be useful to have a setting somewhere to enable this behavior, e.g. "Call prefix number" to allow specifying the number / USSD code.
i.e.
+441234567891
becomes 141+441234567891
or #31#+441234567891
whichever is appropriate for the carrier you are on.
Edited by Andre Klapper