R.Bollen // Brussels. Since I have my new iPhone 3GS, all people who call me go directly to my voicemail, not only that but the battery was draining extremely fast. It was empty in 5/6 hours without using it. After revisiting the Mobistar store, they could not help me because with another SIM card there was no problem, note that I have Proximus.

This morning I found some people with the same problem in some Belgium iPhone forums, and I started to play around with my phone settings. After changing: “settings - call waiting” from on to off, I received calls again and now the battery drainage is normal again. On my friends iPhones (3GS) with Mobistar SIM card, I was unable to set this switch to on, with the following error: Impossible to set the call waiting option.

This is what the iPhone manual tells about this feature;
Call Waiting
Activate or deactivate call waiting
Choose Phone > Call Waiting, then turn Call Waiting on or off. If you turn call waiting off and someone calls you when you’re already on the phone, the call goes to voicemail.

If you know more about this feature please leave a comment, maybe other BE people can check if they have the same problem?

[Update] We have contacted Mobistar, the official iPhone provider, for a reaction on the article.