Sonim XP7700 User Manual page 45

To access call barring settings, in the call settings screen
under Other Call Settings, tap Call Barring. Select one
of the following call barring options:
Option Function
Incoming call All voice calls or voice calls when
barring roaming.
Outgoing call All voice calls or International voice
barring calls or Local and home only.
Change Set new call barring password.
call barring
password
Call Waiting
New icoming call is notified while you are in call with
somebody.
To activate call waiting, in the call settings screen, tap on
Additional settings. Enable Call waiting.
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