If your company isn't tracking all mobile devices, you may be overcharged by your providers. When employees leave, devices should be accounted for and the lines and devices reassigned or canceled. That way, you don't get charged for services you aren't using. Unfortunately, it doesn't take long for these bills to get out of hand. Luckily, there's a category of software that can help your IT staff manage the process easily.

So, what’s the difference between mobile expense management (MEM) and mobile device management (MDM)?