The user was visiting the web page for thinkwellgroup.com (which looks to be a pretty amazing company). They were using a recent model iPhone and were browsing in Safari for the iPhone. They wanted to call for information on behalf of their company, and saw a phone number on the bottom of the home page.
They then had some sort of message from switch.com appear on their Safari screen. Switch.com is a colocation company.
Should they be worried about iPhone security? Could there be an issue with a colocated website?