Secondly, there is the problem of jailbreaking to deal with. "The very control which the firm applies so rigorously to its ecosystem could be its undoing. You've probably noticed, but users don't take kindly to being told what to do. Apple has blocked content in the past, and it has forced users to pay additional charges to turn on Wi-Fi hotspot functionality. This kind of uncompromising philosophy has driven many to jailbreak their phone with a 'my device, my rules' kind of attitude. And a jailbroken phone is not a secure phone," Garlati said.

But when push comes to shove, mobile devices - whether BYOD or centrally issued - are going to pose a risk of some sort. By trying to make a platform appeal to consumers, though, the needs of enterprise users are often neglected, Trend Micro says.

"Against the growing, unstoppable backdrop of consumerization and BYOD, every mobile device is a risk to business. What is interesting in these results is that, whilst some mobile platforms have evolved very noticeably along enterprise lines, there is still a strong 'consumer marketing' legacy in some quarters and this is negating some of the progress made on the enterprise front. Indeed, some of the attributes we have examined in the report are still firmly 'enterprise-unready'," said Raimund Genes, CTO of Trend Micro.

Indeed, consumer devices are still causing for IT departments in many companies, anecdotal evidence suggests. It is also debatable whether actually save a company money, too. So while the security risks of iOS in the enterprise can be managed, you'll need to think about the problems it'll cause in terms of cost and support.