After spending muliple hours in phone shops in Ireland, England, France, Spain, Portugal and Germany, we ended up giving up and using McDonald''s free wifi. We were in a campervan. We bough 3 SIMs in Ireland. We were told they would work everywhere. They worked nowhere. In Germany, we were told we had to have a German address. If we'd known this we could have made one up! Not to be caught out again, for my next trip, I yook advantage of a special offer in Australia from Optus - $45 a month for unlimited texts and calls all over Europe ( including iceland) and 4gB of data monthly. The only country it didn't work was Morocco but we were told that when we bought it.