I am in Europe. I need roaming quite urgently but it will not attatch to a mobile company here. Have tried both settings. I cannot take the back off the phone and cannot dial the 786 number as the phone doesn't work.
Once had just the similar issue and exactly while travelling in Europe. Just switched my mobile plan to one of the popular roaming providers ( pondmobile , available at more than 90 countries ) cos hadn't any other way to get ability to make international calls.