on 01-07-2012 15:40
1750 to turn on 1760 to turn off.
on 01-07-2012 16:48
If the time it rings before going to voicemail is too short you can extend it by dialling:
**61*901*11*NN# SEND (NN is the number of seconds in increments of 5 and a maximum of 30 seconds).
on 21-09-2012 21:13
Excellent. I have been searching for this for a while.
Is there any where that these O2 specific commands are listed?
This might be useful: