Zte Roamer User Manual page 44

Forward your incoming calls to a different
number. And choose when to forward: Always
Call forwarding
forward; Forward when busy; Forward when
unanswered, or Forward when unreachable.
Caller ID
Additional settings
Call waiting
Accounts Set up Internet calling (SIP) accounts.
Use Internet
Choose when to use the Internet calling function.
calling
44
Choose whether people you call
can see your number.
See new incoming calls while
you're on another call.