I have finally heard back from Switchfire, the SMS gateway who sent the message.

According to them, the originator of the message was PeekabooTV.com. Take a look round that site - it hasn't been updated since 2007, and the Contact page leads to a 404.

A quick wander into the DNS registration produces this rather stale information:

GPRS Solutions LTD
   David Berney
   11 Gower Street
   London
   WC1E 6HB
   phone: +44.8707414151

So, using the utterly brilliant WhoRunsIt I can get their latest information from Companies House.

GPRS SOLUTIONS LIMITED
MASONS YARD, 34 HIGH STREET
WIMBLEDON VILLAGE
LONDON
SW19 5BY
Company No. 05966632

Why! It's exactly the same as our friends at EKASure! And identical to Peek A Boo TV Ltd. And, indeed, identical to a whole web of companies run by Md Shamimul Haque.

All roads seem to lead back to EKASure. I've contacted them for an explanation - but so far none has been forthcoming.

All very curious. With so many different companies, each supplying domains, redirects and services to each other - all registered out of EKASure... it's almost like they're trying to hide something.