Oke, But I dont realy know how to do it on a other phone.
Where this setting comes from I do not know.

I have a Nokia N91 but this phone does not have a option to do call forwarding.

Also called my Provider ( Vodafone NL) and they are saying that the call forward is coming from the phone..

I Really need help with this. It is really costing me money.
For some reason every incomming cal is forwarded to a number that does not exist. What the number is is also unknown.

If there is no option to fix this I have to stop using my N900 ( I dont want to ).

I already flashed the phone serveral times (Also the eMMC ) but nothing helps