To increase the time your phone rings before voice mail answers do this:
**61*901*11*noofsecs# max is 30 secs has to be in blocks of 5 enter in time in (noofsecs) i.e **61*901*11*30# that would mean the phone would ring for 30 secs
##002# to disable call diverts
1760 to disable vm
1750 to enable
