[Bossman]

Same here. Have not been able to trigger a call to UM via CBW. I was testing for an upcoming trip. Even a couple of calling cards stopped working to UM. Just plain dead air! Tried my tmobile sim...message says calling to that number has been disallowed. Never thought the problem was CBW (since I was able to get a callback to other numbers), so I contacted UM and they said it depends on what calling card or carrier I am using to make the call to the UM sim. When the UM guy said he called my # from a german landline and it worked and went to VM I figured something is being blocked. So, I gave up.

Finally, I decided to try if I can forward my globalasim to UM. Well, it went through, I let it ring and roll to VM. Guess what? I was charged $0.78. I knew globalsim could not continue to offer forwarding to Liechenstein for free.

Edit: For me, without CBW's very good rates, UM is not much useful. Outgoing calls are not really cheap. Ok, incoming calls are free in a lot of countries, but as we all know, it's outrageously expensive calling a UM number. Most calling cards are upwards of $0.40/min. BTW, I also tried CBW PIN2DEST. It was just dead air...but still got charged on both occassions.