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31-05-2006, 16:15
In certain countries, attempts are made to block access to callbackworld by blocking incoming calls from them....that is one possibility.
Also you might try to make the call from the UM menu on the phone, some phone models do have a bit of a problem...try changing the roaming network by going into your configuration menu and selecting a different roaming partner...I know some in Germany have reported one of the networks blocks UM calls but another doesn't.
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