Able to receive data in EU but not make phone calls
When I switched on Data roaming in Italy, I was able to send and receive emails and use the internet without any problems whilst out and about without wi-fi support. But I was unable to make any phone calls at all, wherever I was in Italy. Whenever I tried to make a phone call, I got a recorded message in English telling me I wasn’t allowed to make the call … I can’t remember the exact wording, but that was the gist of it. My partner tried calling me several times but wasn’t able to connect with me either.
During that period in Italy, curiously, I received two texts from Smarty, one saying “Welcome to Italy’ and providing rate advice, even though by that time I'd already been in Italy for a week and spent the preceding few days and the following few days in exactly the same place.
All of this came as a surprise because I experienced no problems at all using (the same) mobile phone in Copenhagen a year ago. My access point name was (and still is) set to mob.asm.net as advised. So what caused this failure of service and how can I avoid it happening again when I go to Malta in a couple of weeks?