I have seen the
www.oneroam.co.uk site. They sell international prepaid cards which at first appear travelsim rebranded. But there are some differences:
1) The oneroam has call setup whereas travel sim does not have
2) The oneroam card seems to have more countries (e.g. Hong Kong)
3) The oneroam seems to have free incoming in Greece and Italy which is not the case for the travelsim.
Any ideas;;