It's Halloween season, and that means zombies and other scary stuff. We're talking about zombie-killing for a livin', we're talking about sharkin' (a slightly altered quote from Jaws, one of the scariest movies of all time).

In tech speak, however, zombie phones (a term coined by Amtel, a mobile device management company) are scary in a different way. They are corporate-owned or BYOD phones thought to be deactivated yet these undead phones are still sucking dollars from the mobile budget.

It's no joke, despite the corny intro. During an audit of mobile devices for a large multinational biotech company, Amtel discovered that 2 percent of mobile phones were zombie phones that were costing the company $70,000 annually.

Amtel revisited the zombie phone by crafting a Halloween-themed infographic. If you want your zombie fix, or you're a CIO in need of a little scare, check it out:

Tom Kaneshige covers Apple, BYOD and Consumerization of IT for Follow Tom on Twitter @kaneshige. Follow everything from on Twitter @CIOonline, Facebook, Google + and LinkedIn. Email Tom at [email protected]

Read more about mobile/wireless in CIO's Mobile/Wireless Drilldown.