It's kinda amusing I'm reading this "news" by help of HN on BBC News page. Still, it seems to be really not interesting (typical to "silly season" or as we're saying here in Poland "cucumber season") as no other media outlet has copied it - well, beside Super Express but that's just a tabloid newspaper of same level as British The Sun, and they love such - pardon the word, shit.
"Scientists rack up huge phone bill - your jaw will DROP when you learn why!"
That said, while the article itself may not be much more than an anecdote, it does seem to have inspired some interesting SIM security conversations here.