Despite the zero-cost in device procurement and less device support in some cases, there are other costs involved in BYOD rollout, analysts warned.

Gartner research director Song Chuang said that with BYOD, costs are 'moved around' instead of disappearing. According to a Gartner report, as the capital expense of a device is usually around 20% of its total cost of ownership, the small potential savings are often offset by other expenses. "The technical complexity associated with BYOD programs requires additional skills to support extra platforms, more apps, and tightened security," said Chuang.

Though enhanced productivity is often touted as BYOD's biggest benefit, Ovum (http://www.ovum.com) analyst Richard Absalom argues this is hard to gauge. BYOD is part of a bigger picture when it comes to performance or productivity gains, so it takes a few years of observation before you can make a conclusion, said Absalom.

Today's BYOD also means a move from supporting laptops and Blackberry phones to new devices, he added. "Some firms might not have the required expertise and thus ending up spending extra money in training, recruiting, and buying third-party tools," said the Ovum analyst.