Many consumers use portable devices to connect to the Internet. Because these devices often contain a lot of personal information, treat them the same as a home computer or laptop. This is especially important since these devices could be easily lost or stolen, given their portability.
Use the following tips to secure mobile devices, such as smartphones and tablets:
Set and use the locking feature. This will help keep your information safe in the event someone gains physical access to your device.
Turn off Bluetooth, Wi-Fi, and any “geolocation” or “geotagging” features whenever you are not using them. Geotagging refers to apps or programs that display your location when you, for example, take a photo. This feature is similar to how a vehicle’s GPS or navigation system can determine your location.
Review social network settings on each device used. Some settings may not carry over from the same social network’s desktop or laptop programs.
Only use official app stores to download applications. Downloading free apps from unknown sources may lead to malware and put personal information at risk.
Before downloading an app, be sure you are comfortable with the “permissions” it may require you to provide. Know how your information will be accessed and who it will be shared with.
Delete apps you no longer use.
Download a “locator” app from your device’s manufacturer. This app may be able to trace a device in the event it is lost or stolen. Some apps include features to remotely lock a device and/or wipe out all the information on the device.
Only recycle or dispose of a mobile device once the hard drive is wiped clean. If needed, take the device to a professional to be certain all information is deleted prior to recycling, selling, or disposing of the device.
source: http://www.ohioattorneygeneral.gov/Individuals-and-Families/Consumers/Cyber-Safety/Cybersecurity