I activated forwarding between my two phones (and two lines) in order to create some level of backup since either network had been very unreliable.
However, once a call was diverted to the second line, I was billed on my first. In addition to this pay-per-call-received rubbish, I also got complaints that my airtel line give a ringtone on the far end, with my phone never ringing – so I chose the cancel the whole thing as it caused more harm than good.
It was easy doing this on my Nokia C2-00. Simply go to Menu->Settings->Call->Call Divert->Sim(x)->”Cancel All Diverts”. It was however a different story on my Galaxy Ace Duos. I couldn’t find this same functionality in the call menu.
With no extra time to tinker with the phone, I resorted to good ‘ol GSM codes – remember them? Those familiar MMI codes popular in the days of Samsung SGH-?? and Nokia 3310s. Not like these phones didn’t have the functiality in their menus, but knowing them by heart and reciting them while you typed them in gave you off as “skillful”.
But here I was, couldn’t remember the required codes…but could remember the almighty Google – and this is what I found (Courtesy ucilia.com)
…what I needed, and some more (N.B I didn’t test them all, so unless you know what you’re doing…)
So, in the end, I was able to deactivate the diverts.