setting original call forwading langsung meneruskan panggilan masuk, ada kalanya kita perlu memforward dengan kondisi tertentu saja

iPhone is considered as a revolutionary mobile phone. May be it’s too revolutionary that it lacks some very basic features. Some iPhone users (including my wife) complain about the absence of conditional call forwarding feature (which can be found in most mobile phones):

Call forward if busy – Forward incoming call to another number if you’re on call
Call forward if not answered – Forward the incoming call to another number if it is not answered for a predefined period of time
Call forward if not reachable – Forward incoming call to another number if the phone is off or without signal

iPhone allows you to setup basic call forwarding to direct all calls to another phone number. However, it doesn’t provide any interface to setup “Call forward if busy” and other conditional call forwarding.

Despite the lack of user interface on iPhone to activate conditional forwarding, you can use the so-called “Call Forwarding Code” to activate it. Here are the tricks:
Activate Call Forwarding

Setup call forwarding when busy
To setup “Call forward if busy”, simply dial *67*[another phone number]# and tap “Call”

To setup “Call forward if not answered”, simply dial *61*[another phone number]# and tap “Call”

To setup “Call forward if unreachable”, simply dial *62*[another phone number]# and tap “Call”
Deactivate Call Forwarding

To deactivate “Call forward if busy”, simply dial #67# and tap “Call”

To deactivate “Call forward if not answered”, simply dial #61# and tap “Call”

To deactivate “Call forward if not reachable”, simply dial #62# and tap “Call”

You do not need to remember all these codes. Say, you usually use “Call Forward if busy”, save the number as a new contact. Next time, when you need to activate call forwarding, just look up that contact and dial the number.

Setup call forwarding as a new contact

Note: The above codes should work with most GSM networks. If it doesn’t work, please further check with your carrier. For AT&T user, you can also check out the details here.

sumber : http://www.simonblog.com/2009/08/03/iphone-tip-how-to-use-conditional-call-forwarding/