Need to change the call forwarding number. Unable to edit/delete the old number.
Iphone 5
iOS 8.0.2
Use below codes on your phone dialer keypad. I have them saved in a note,since iOS has been retarded, when it comes to conditional forwarding vis-a-vis old Nokia phones.
•To forward all calls unconditionally:
to start, enter **21*number #
to stop, enter ##21#
To forward calls while you?re speaking to someone else( when busy)
to start, enter **67*number #
to stop, enter ##67#
To forward calls if you don?t answer the incoming caller within 30 seconds( when unavailable)
to start, enter **61*number #
to stop, enter ##61#
To forward calls if your cell phone is switched off or is out of reach
to start, enter **62*number #
to stop, enter ##62#
To cancel all preset conditions:
enter ##002#
Edit:You will have to press the call button to activate the codes.