Hm...how many bars of signal did you have? Because after reading your post, I called myself too, and sure enough, it did a semi-ring through the dialing phone, then went straight to voicemail (this was with 0 bars of signal in my basement, but not disconnected from the network yet). So all I did was move it 1-2 cm (and literally had the phone pinned towards my basement window) and voila! my call goes through with no troubles. So not sure how many bars of signal you had (I'm guessing good enough for you to be ticked off) and literally every cm counts (which sounds silly I know lol).
WIND Everywhere 60
CA+US Calling, 10gb Data, Global SMS, VM+, World Saver+Traveller, 2400 Mins + 1gb Data roaming within NA