CIO — If you're an Apple iPhone user and security's not on your mind, you're at risk; at risk of having a Web mail account hacked; at risk of having your online identity stolen; and at risk of losing valuable personal information, such as wireless service account data, that could result in financial losses, among other disasters.

When it comes to mobile devices, security tops the list of IT security managers' concerns. And rightly so: According to a Computing Technology Industry Association (CompTIA) survey of 2,024 information security professionals earlier this year, more than half of respondents say risks related to mobile devices and remote workers are up significantly compared to 2007.

Even if you use your Apple iPhone strictly for play, it pays to ensure that you're checking your e-mail, surfing the Web via Wi-Fi and accessing various content and services in the safest possible ways. You can follow these six tips in a matter of minutes, and potentially save yourself weeks of damage control.

iPhone Security Tip 1: Enable Auto-Lock

One of the most basic iPhone security functions is the Auto-Lock feature, which locks the device's touch screen after not being used for a preset time period. Users can choose to set their iPhones to lock after not being used for one, two, three, four or five minutes. Auto-Lock can also be disabled altogether.

Apple iPhone Auto-Lock Screen

Auto-Lock is turned on by default, but you can change the settings by first clicking the main iPhone Settings icon, tapping the General tab and then hitting Auto-Lock. Then select the desired time period by tapping the on-screen value. Finally, exit the Auto-Lock and Settings screens by tapping the box in the display's top left corner.

Though Auto-Lock is not exactly a security function on its own, when combined with the Passcode safeguard described below, it's an essential iPhone security feature.

  On to Passcode Lock and Wi-Fi Security >>

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