User's Manual

Z.T.S. Intermational Industrial Co. Ltd G28i
Page 109
calls because you can only talk to one
correspondent but hold on another call.
Call forwarding It is a network service，which allows you
to forward calls to a special number. The
following 5 configurations are possible:
Unconditional, Conditional if
unreachable, Conditional if no reply,
Conditional if busy, and Forwarding all
the digital calls.
Roaming It means that the mobile is used in a network
doesn’t belong to. There are two kinds of
roaming: international roaming and domestic
roaming. The roaming in this manual means
the international roaming.
STK STK is a new service of GSM. Its full name is
SIM toolkit. You can receive flexible information
as the Stoke, Traffic, Weather forecast, and so