The GSM standard knows two kinds of call divert:
- Unconditional call divert
- Conditional call divert
Conditional call divert occurs on any of three conditions:
- Divert if no answer after 'x' seconds
- Divert if unavailable (cellphone switched off or out of range)
- Divert if line busy
Furthermore, the GSM standard knows three different types of call:
- Voice call: normal communications when you pick up the phone to talk to someone.
- Fax calls: the GSM terminal being called is a fax machine.
- Data calls: your cellphone is acting as a modem hooked up to a computer accepting inbound data from elsewhere.
Each call type is assigned a number: 11
for voice calls, 13
for fax calls, 25
for data calls.
You can activate or cancel conditional call divert on your device. To do so:
##62# : Cancel divert for all call types
##62*11# : Cancel divert for voice calls
##62*13# : Cancel divert for fax calls
##62*25# : Cancel divert for data calls
This code does not hurt your device only helps it to tell it what to do in certain situation of a voice, data, or fax call.
This is a link to a site which goes a little more in depth with the meaning of conditional/unconditional call diverting is. Hope this helps!!!