I'm using a Sprint BlackBerry 8830 WE (SIM-unlocked by default from Sprint) in Bangladesh (Small country beside India) with a GSM operator. They don't have BIS, so I'm totally using the phone for voice & text. The problem is- I can't use conference calling, calls are not joined even if I click the conference call in the menu, while I'm on the first call. Also, when I'm on one call and get a second call with call waiting, the first call is disconnected. I used to do conference calling and use call waiting regularly on my NOKIA E63. I need help on this.
My OS: 4.2.2.196 (Platform 3.0.0.85).
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